gantlet-gauntlet!

old story...a student was talking to his English professor about a late assignment, and promised "I'll get it done quick."

"No", said the teacher, "You'll get it done 'quickly'"

"Aww," grumped the boy,"What difference does an 'ly' make? You know what I mean."

"Well," replies the professor, "it can make a lot of difference....see that pretty girl over there? Now do think it makes a difference whether you look at her 'sternly'...ot at her stern?"