A tragic accident for a student using a stabilizer while filming on top of a roof, I know this is extreme case but how many times we ran into some problems tripping or fallen using stabilizers, it's a lesson learned that you have to be extremely careful and know your surrounding at all time and I really think having a second person with you when you are using stabilizers will prevent accidents like this.

Police: Emerson College Student’s Deadly Fall A ‘TragicAccident’ Police: Emerson College Student’s Deadly Fall A ‘Tragic Accident’ CBS Boston (http://boston.cbslocal.com/2011/04/18/police-emerson-college-students-deadly-fall-a-tragic-accident/)