Kiss Kiss Bang Bang Harry, one notable exchange:
Harry: I feel badly.
Harmony:It's bad. Badly is an adverb, So to say you feel badly would be saying that the mechanism which allows you to feel is broken.
(which later leads to)
Perry: Sleep badly. Any questions hesitate to call.
Harry: It's bad. Sleep bad. Otherwise it makes it seem like the mechanism which allows you to sleep is...
Perry: What fuckhead? Badly is an adverb. Who taught you grammar. Get out, vanish.