Attach the auto fooler to a spark plug of a car, lawn mower, outboard motor, or anything that has an electronic ignition and a spark plug. When the victim starts the motor, a loud whistle will go off along with a cloud of smoke. Instructions are included.

Auto Foolers were first invented before 1941 and were available until 1990 or so. It has finally been reintroduced after an long period of engineering that would satisfy the D.O.T. and the C.P.S.C. The new version does not have a Bang to it but it does have a whistle and smoke. A great old item that is once again ready to have fun with. Be sure to read all safety information included.

For tips on the proper way to use practical joke products, subscribe to The Practical Joker Weekly Newsletter at the bottom left of this page. It's free and you can win a bag of tricks by sending in your practical joke. Following is a reader's submission of his experience with the auto fooler.

Once we put two of them on a friend's motorcycle. We were following the logic that if one was good, then two had to be much better. This is the kind of thinking that usually gets pranksters in trouble. When the unsuspecting victim started his motorcycle, he was engulfed in an enormous cloud of smoke. Then a film of oil on the engine actually caught on fire. It was pretty spectacular. Fortunately no harm was done.