An irresistible joke : you are with your friends, on stage, or in a restaurant, and you complain for a neck ache... To prove it, you turn the head, and everyone will hear a baleful crunching !
-Of course, you can do it with your elbow, your knee,...
-It does work with mechanical noises too : wind up your watch, you will hear a very bad sound !
-Open a door, an abominable grating will rumble.
Generally, it will work with all mechanisms !