Haha, oh yes...I've seen the leo tail rattling. It's loud and craaazy! I can hear it form quite a ways off and somtimes the males I have just do it randomly in the middle of the night while i try to get to sleep.
As far as ball pythons go, I have yet to see it from stress myself. Or at least when another ball python is not around/considered to be breeding behaviour. I honestly didn't know they did that when stressed, lol. I've only gotten the hisses and a strike from babies.
I myself thought maybe the tail wagging with females was a good sign too because my female would do it each and EVERY time my male would be with her and I did have a sucessful breeding even with the tail wagging. If she wasn't ready I would have thought she wouldn't allow it, but it's just something we'll never be sure about I am....sure, haha!![]()