If you're thoughts have immediately raced back to a Justin Timberlake skit (NSFW) on Saturday Night Live then you will probably get this joke.

No it's not THAT in a box, it's something totally different but still just as funny. Have you ever been walking by a parked car and the person that owns the car hits their remote alarm button and the car horn goes off? It can make the most stoic among us jump right out of our skins. Now imagine a car horn hidden some place you wouldn't expect it to be, say for example in a tool box. Watch as the hilarity ensues!