Well, if that were an option, it'd be nice, wouldn't it. But I haven't earned any sick time and there doesn't seem to be an unpaid personal day thing available and I haven't been here long enough yet to know how to get things classified.
I wonder if they'd let you go in the hole on sick days, like they're going to do for you with vacation.
Alternatively, pump the fluids, take it easy, and duck out the second the clock hits quittin' time. ;-)