Wrench Gag

A magician asks a child to step onto the stage to help him. He welcomes the child by shaking hands. The hand, the whole arm seems to wobble terribly. "Your arm is very loose, let's tighten it a bit". The magician produces an oversized wrench and starts to tighten the child's arm, which produces a terrible creaking noise. The child, surprisingly, is not frightened but squeals with delight. The child's arm is shaken again: "Okay, that's better now." A bit later, the magician's table is in the way, it is moved aside. Oh dear, it's wobbly, too! "I think we should tighten it as well". Again, the giant wrench is used; again there is a terrible creaking noise. The magician opens his magic suitcase which squeaks and is tightened with a lot of noise. Since we have started using this wrench, we have had lots of ideas: You go on stage, position the microphone at the right level, it collapses and is screwed together with a creak. You are limping, take off your shoe and out comes a big stone (made