Today I was working on my coworker's laptop, where the keys must be in slightly different places than mine, and went to activate Expose.

Except I left the shift key down (accidentally) while I was doing it.

Suddenly, instead of the normal relatively fast expose window zoom, everything went in slow motion. Really slow motion - the whole transform took around 3 seconds (instead of the instant it takes normally).

semi-historical note: holding the shift key down while clicking on the yellow "minimize window" button in a widow's title bar produces a similar effect - one that Steve Jobs showed during one of his keynotes. However, I don't remember seeing this trick with Expose demonstrated on stage (or am I forgetting?)

Give it a shot - remember, the shift key needs to be down in addition to whatever expose hotkeys you have set. I haven't tried this with the hot-corners (since I don't use them), but I expect similar results from them.