Hey hey. This fall I am attempting my first real feature - on no budget, as it is a high school thing just with friends and a couple hundred bucks in our pockets.

The movie is a comedy about police, so it shall include lots of gunplay. Not a problem, we've got that stuff set up.

Where we encounter a problem is the first scene includes a diner being shot up. One shot in particular we need is a closeup of a drinking glass, that a bullet hits (not necessary to actually see the bullet) and the glass just explodes as if it has been caught in crossfire.

My question is - how do we manage this? We can't cut away or anything, it must be a single shot with the glass just bursting as if it has been hit. I have experience in Premiere Pro 1.5, Vegas 6, and VERY limited experience with After Effects 6.5. (If someone gave me a step by step tutorial for AE I could do it, but otherwise I'm lost as of this time.)

Remember, we have very little money and cannot afford squibs or whatnot, unless they can be made easily at home - which I realize is dangerous. So any suggestions would be greatly appreciated!

Thanks in advance,

Loggie B~

We talked about this, and the solutions that we came up with involved an air powered pellet gun or a bb gun. And I'm not sure that I should be advising you to use guns on this forum.

If nobody else comes up with anything, and it's alright with Chris Hurd, I'll pass our thoughts along. But before i do, let's see if anyone comes up with something less risky than the solutions we arrived at.

Its probably quite dangerous but I guess if you got everyone involved to ware protective gear and safety glasses , you could use an old fashioned sling shot with a ball bearing or small pebble, but please be careful ,can`t stress this enough, because injury is bad and will cost you money

Consider purchasing or making a pane of sugar-glass instead of glass-glass.

http://en.wikipedia.org/wiki/Sugar_glass

Even with BBs and slingshots, there is a risk of ricochet, or even flying glass. Maybe you should save up and hire an effects crew for this scene.

Thanks for all the replies so fast =)

I might have to look into this sugar glass idea, it seems like the safest way. I do have an old slingshot I could use, but that seems fairly risky for all involved. If I can bake up some sugar glass, I might just be in business.

Thanks again to all who posted~

If your shot is just a closeup it doesn't have to be shot in the bar or diner your shooting the other stuff in. If it were me I would find an old shed or something and stick a few lights up and then find some wood thats the same colour as the table top in the diner . I would have the camera back a bit and angled down so your just framing the table and glass, zoom in so your not in any danger of being hit by glass and then just shoot it with an air rife (any air rifle around 11 or 12 foot pounds will destroy a glass).

In this case you could do it alone so no one else could possibly get hurt.Your lighting doesn't have to be perfect cause there is so much you can do in post to colour correct it.

Just my 2 cents.

Andy.

How about a greenscreen edit?

1 shot: Glass in foreground with cast in background to establish.
2 shot: Remove cast and glass and film background element.
3 shot: Substitute background with green matte background
3b: shoot the glass exploding.
4 shot: With no glass, film cast reaction.

Use AfterEffects or other editor to edit shots together.

Our thinking was this - put on safety glasses and long sleeves and shoot the glass with an air pellet gun. You could also heat glass, pour water in it so that it cracks, and then shoot it with a bb gun.

Someone else suggested shooting it in a shed - good idea, if it's possible.

How about a greenscreen edit.

I thought about that aswell but the thing is your gonna have alot of trouble trying to use chromakey on something clear like a glass, it would have to be a solid colour for a key to work and it would still mean shooting the glass in the diner.

You could find a shed like i said ,set up your fake table and then put a greenscreen up like keith said and use a coffee cup instead of a glass then key in your background plate. An acceptable compromise.

Andy.

Ever hear of 'candy glass?' I couldn't tell you how to make it, but it's fairly easy if you find the recipe. I know there has been quite a few movies that have used "candy glass" as it isn't as sharp, it's cheaper, and plus, it's bio-degradable. As for what you'll use to make it shatter...I don't have the answer for you there. ;)

if the shot will be a CU of the glass, then all that needs to be in frame is the glass and the surface it sits on. If you can mimic/reproduce that surface, perhaps you could cause the shattering by drilling a hole in that surface and "attacking" the glass from underneath. You could even epoxy the glass to the base so it won't move. You may be able to get the effect you want using some glue, a hammer and nail. Just be sure the "attacker" wears protection.

Good luck, and let us know what you decide to do.

You could use an airgun to break the glass. And if talent has to be nearby, then set the shot up as a split screen: The glass gets shattered in half the shot. Then the talent reacts in the other half.

Put the two halves together in post and, with creative rotoscoping or masking, the two can actually overlap.

When shooting the glass, you can use an old phone book as a pellet catch, backed with some plywood.

The split-screen suggestion Dean makes is definitely workable if the bb gun is safe at your location. I helped with a shot where a car needed to almost hit the actor. We had the car pull up and slam on the brakes, then we had the actor walk in after the car left and act like he was almost hit by a car at that spot. It takes some creativity to split the screen and the camera must be locked down. A quick cut just after the reaction to a reverse-angle of the actor and car together helped cement the seeming reality of the shot. NEVER do anything dangerous with the actor in the shot. With modern technology, there is no need to risk people's lives for your movie.

I seem to recall seeing how this is done professionally. I believe a type of fragile clear plastic is used and a tiny explosive charge inside a device drives a metal pin into the "glass" and makes it shatter.

I'm going to have to side with Keith a few posts back. If you have a shot out of focus (background) of people moving behind the glass, then have them refracted as they pass "behind" it (the one that's not really there, but will be added later when you chroma key it).

I'm interested in learning more about this "pin/explosion" from the previous post though. Sounds interesting.

I believe a type of fragile clear plastic is used and a tiny explosive charge inside a device drives a metal pin into the "glass" and makes it shatter.

I think explosive devices are only used when necessary.

"Demolition Man" with Stallone and Snipes used a higher-tech version of what I understand as the "pin explosion", i.e. a powered "pin" used to shatter glass.

The scene was where Snipes was firing some weapon at Stallone as Stallone ran through a room full of display cases. The large, glass panels were shattered using some sort of relay that activated a small, short metal rod that acted as a hammer of sorts. Each "hammer" was located near the bottom of each pane of glass. For the shot, the relays were actually hand-activated by someone off-screen and timed to Stallone's movements as he passed each display case. In that instance, I believe they used real glass. (You can learn a lot by watching HBO for "The Making of...", and "Mythbusters" also presents some creative ideas.

My suggestion of a hammer and nail from underneath is a cheapo version of the pin explosion...without the explosives or electric relays. A spring-loaded pin would probably work as well.

Whatever methond you use, just be sure to have a few extra glasses handy for multiple takes.

Let us know what method you end up using.

Thanks for all the replies, guys. The shoot isn't for another few weeks, so I have lots of time to prepare.

It looks like I might be going the route of the BB gun, simply because it is the only piece of equipment mentioned here that I can get for free. However, I do plan on trying out Denis' technique of the hammer and pin - I'll do a few tests and see how it looks.

Hopefully it will work, as safety is a huge concern, especially in a public school environment.

So thanks again to everybody, you've proven once again why I come to the DVi in the first place ;D

~Loggie B