Geordicat's "asprin" thread reminds me of a situation my brother got into during his first year of college. I think he should have used "the line."
My brother was taking a regular course load and was a member of the school orchestra, as a violinist. One night he had an early-evening rehearsal (which was supposed to end at 6:00 or 6:30), after which he was going to go home and finish his homework for the next morning, so he could go to bed at a reasonable hour. Well, the orchestra leader (a student herself) decided to make it a late-night rehearsal, and my brother protested that he had homework that was due the next day. The orchestra leader's response? "Well, just have a drink with lots of caffeine in it, then you can stay up all night to finish your work."
The assumption was that since a lot of college students do that kind of thing (stay up all night finishing assignments), then my brother would necessarily want to do it, too. The fact is, he's the kind of person who needs at least nine hours of sleep a night; morevoer, he doesn't like rushing to do things at the last minute.
I just thought the orchestra leader's response was very presumptuous. (I forget what my brother actually ended up doing, by the way.)