My veiled fell a few times in the first few weeks after I moved him to his new enclosure. Always from the roof. I'm guessing the aluminum mesh is quite a bit different to climb on than the Reptarium plastic stuff. He landed in his plant most of the time, usually looking around like "WTF just happened?!" before composing himself and putting on the "I mean to do that...." affectation. Once or twice he fell all the way to the bottom, but the process was the same - a few seconds of stunned confusion, then the "that was on purpose..." look as he climbed back up.