It's hard to know what to do with TNT. Any object with jjOBJ::isBlastable has a risk of having its jjOBJ::xSpeed and jjOBJ::ySpeed set by a TNT blast. See DoFullBlast in g_hit.c, where Arjan acknowledges this is an issue but never got around to solving it. We don't notice this for most objects because a single TNT blast will kill them, except for occasional Tuf Turtles walking around at super speed, but it can also mess up Bubba and Devan in particular.

Probably the simplest solution would be to change TNT so it only sets speeds for pickups and bullets, not for other objects such as enemies and bosses. I'm not thinking of any obvious reason that would be a bad idea, but I'd invite people to weigh in.

Please don't use the same thread to report multiple things. If a thread clearly states its issue in the opening post and title, it's easy to remember where it was reported, it's easy for other people to know what the thread is about and reply to it with their own experiences or preferences, and it's easy to decide when it's ready to close. If there are multiple issues in one thread, none of those things are true.