Roommate covered entire bedroom in tin foil while my brother was home for Thanksgiving.

Ok. This is clearly a waste of some good foil. This is what happens when you have a lot of time and money on your hands, and are perhaps 'one-fry-short-of-a-Happy-Meal'. You cover an entire room, including the floors, with aluminum foil, while your roommate is away for Thanksgiving...

TheTrubadour44