How can I get my Self-Destruct switches to do something?
Zip on over to Edwards Signaling, and pick up one of these
Motor Driven Industrial Sirens ($1090.00).



Have a listen

And a AdaptaBeacon Rotating Light ($972.00).



Wire them up to the switch, and enjoy.

You might also want to grab a pair of these.





For pranksters on a budget, you could get one of these 120V Selectable Output Horn/Strobes (~$50.00).



But you might want to cover up the word FIRE, to prevent confusion.