Well I am not 100%... My cham will "shut down" like this if he is very scared or freaked out... This has only happened 3 times. 2 times when he was outside and a raven flew right over us... And once when he saw another chameleon.Nope nothing fell or touched him. When we moved him he was siting on the rocks in the live plant though which could have scooted a little, but not a lot.