Captain Holt: Jeffords, evacuate the precinct. I'll contact the bomb squad.
Jake: No, no, no, no, no, wait. I think this actually might have been a prank that malfunctioned. Look, the box was connected to a tank of compressed air under the desk. It was supposed to shoot glitter at whoever opened it, but something must have clogged the pressure release valve, and the tank exploded.
Sergeant Jeffords: Wow. The silver lining is no one got hurt.
Captain Holt: And the lead lining is that this prank caused significant property damage in the precinct.