Wind up 80's style

Know anyone with a car stereo that still plays tapes? Want to wind that person up? Try recording 10  minutes of silence on a cassette tape, followed by a siren alarm, then by an official-sounding voice saying THIS CAR WILL SELF-DESTRUCT IN TEN SECONDS. 

Now rewind the tape, place it in the car stereo, press play, and turned off the engine. When the car is started the tape starts playing silence until suddenly, about 10 minutes into the journey the alarm and announcement is made. Causes consternation in their soul and an abandoned car, much to the amusement of everyone watching.