I got a suggestion to put this thread here instead of in general.
I'm pretty sure that everyone who makes animations has a flash oddities, if we can call it that. What do I mean? I mean something that when you make an animation, you have to do, or you can't do, or something of the sort. When I make an animation, I HAVE to make the character play an instrument correctly. If they are playing piano, and there is music to the flash, their hands or arms or fingers have to be correct according to the song. Same for guitar.
What about you, what are your flash oddities? (Don't worry, we all want to know [and you want to know ours, don't lie you silly child.])