Call it a clever senior prank. Flint Hill seniors wrapped the Upper School Office in aluminum foil as part of a tradition for graduating seniors last week. About 20 students spent 2 1/2 hours wrapping everything — staplers, phones, chairs -— in good old Reynolds Wrap. (Pictured) Patty Pfeiff, the Upper School Administrative Assistant, tries to do work in her office. Seniors Alix Ginsberg and JJ Khoury were the brains the prank.