Air locker fun! ;)

Ello all. Am doing some few wiring jobs on me mates 90 with air lockers. What I'm wanting to do for abit of fun (payback!) is just to un-plug the wiring from his switches going to air lockers and compressor and instead wire all 3 switches into somthing completely useless like a reversing buzzer or his horn live or windscreen wippers.

What would be the best thing to hook up to it?? I don't mind spending 10pound on somthing funny to wire up.

Give me some idea's!?

a balloon that pops up from the bonnet with writing on it saying "your skill button broke" when he turns on the pump

Air horn?

Connect up an electric toilet air freshener under the dash.. we did this to a mates blinged up supra he thought it was his second map for racing... Lol