I'm going to enjoy devouring you, Bart Simpson. Yes... I believe I'll start, as you've so often suggested, by... eating your shorts.

Homer: I've gone back to the time when dinosaurs weren't just confined to zoos! OK, don't panic -- remember the advice your father gave you on your wedding day.
[In Homer's Memory:]
Grampa: If you ever travel back in time, don't step on anything because even the tiniest change can alter the future in ways you can't imagine.