My chameleon Rygel has used his tail to catch himself from falling a few times... he has underdeveloped claws so once in awhile he's slipped.
As a result, he's strained his tail a bit and it has tiny crimps in it, but nothing as obviously bent as the your picture. I'd probably take it to a vet, but even then I'm not sure what, if anything, could be done even if it was a break.