For best effect, use it just as someone enters the room - as when you press the key, your hat/wig flies off with matching whirring siren noise.

This would require a compressed air pack somewhere in/around your hard drive, with a tube running up the inside of your leg to under your wig/hat.

Imagine looking across the office cubicles to see and hear hats and wigs flipping and jumping around, signalling each worker's relief of tension.