One of my favourite examples is in Final Fantasy X where each character's most powerful abilities can only be done in Overdrive.
2. Whoa! He's gone into overdrive! Run!
K: whats the dealy-yo my mizzle muahhahaha, like, ur face is stupid hahahha!!!!
J: dude, you're in overdrive.
Karl (who hasn't slept in days):"uhhh hahahaha what the fuck? haha i'm going crraaazyyyyy"
Jeremy:"DAmn man.. you must be on overdrive"