You open one of the 997 boxes on this floor and find...
One silver bullet, .45 caliber, suitable for a handgun. The bullet may be used to solve any problem - if you fire it at an opponent, the opponent will die, or be rendered harmless, or surrender, depending on the firer's best interests. Fired at a broken piece of machinery, it will fix it. Fired at a difficult math problem, it will solve it.
A mood ring. When put on, it instantly turns red, and the wearer becomes angry. Twisting the jewel in its setting causes it to change color, and the wearer's mood will change accordingly.
An black metallic statue of a groundhog covered in obscene runes.
An odd device labeled "Banana Straightener (TM)." It works, but the straight bananas produced seem somehow . . . ominous.