Ok this is something i was once played a prank on with. Dont ask me exactly how it worked i never asked the specifics. Control column from a car where the various leavers are located, the one that honks the cars horn is attached to some string, when the string is broken the horn goes off indefinitely till disabled. I think the wires must of been reversed, I dont know much about cars or mechanics. Someone would know how it works. Could easily create a remote controlled version by adding a small remote controlled knife mechanism leading a hoard into a well placed trap or as a diversion.