First of all I am so excited to be part of the ArmA community, ArmA III will be my first game in the series :)
While I was playing Showcase: Vehicles I discovered that when you go prone and uphill the screen flashes continuously with what seems to be a view from a camera view slight above you. This happened when going to steal the vehicle approaching from S/E in prone position(the enemy camp is on top of a hill). I have bought it on Steam.