Firstly my sympathies to all of Garys family and may he RIP.
Ive spent the day going through video footage of GS and yesterday on FF was very interesting,Lots of very praying like hand gestures,he also seems very tense and almost fetal shaped body positions at times.When i viewed other footage hes generally more motive and relaxed.I also noticed lots of 1 leg grabbing around the other where as in other footage he sits quite open stanced.This hooking/grabbing of a leg action often signifies a yearning to keep something locked in (not to speak out).Also lots of lip biting again signs of anxiety.
I know its easy to spot for anyone trained in this science after the tragedy but there is no way anyone could have forseen this from FF alone.Especially as theres no knowledge of any kind of major upset or upevils in GS life.A true tragedy.