weird cham behaviour

[Bartman]

My veiled chameleon has be acting extremely odd since last night. At around 11 (lights go out at 930) i heard a thud, and opened the lights to see he fell out of his tree...i was really worried but he got right back up to his tree and was fine for the night. Then in the morning at around 11 (i only woke up then lol) i saw him running around the tank on the screen and now its 6 and he doesnt seem to like his tree. I am using a ficus bush and ive added some other branches going across the habitat. I mist all the time and temps are at 90. Is their something wrong with him or is he scarred of his tree or something. I was thinking to get a smaller tree so he can get lower down if he wants causs the one i have doesnt have to many leaves in the mid area, their all at the top and he never really goes their.