It seems like every single movie has one, but they're rarely discussed.
any memorable ones out there, for any reason? and are there any that are especially bad?
I like this one from The Mutilator:
"By Sword, By Pick, By Axe...Bye Bye
it's a valiant attempt at a word gag, but it doesn't quite work because 'Bye' has an extra 'e'.
it works better when spoken...but when was the last time you said a tagline out loud to someone?