In the movie "The 40 Year Old Virgin", the scene where Andy has his chest hair removed required 5 cameras set up for the shot. Star Steve Carell's chest hair was actually ripped out in the scene. The actor had told director Judd Apatow just before shooting the scene: "It has to be real. It won't be as funny if its mocked up or if its special effect. You have to see that this is really happening." The scene had to be done in one shot!
In the movie The Hangover, no effects or prosthetics were created for Stu's missing tooth. Actor Ed Helms never had an adult incisor grow, and his fake incisor was taken out for the parts of filming where Stu's tooth is missing.
A human’s threshold for audible pain is 140 dB which is why, in most cases, music at a rock concert can hurt a little (even if you’re not close to the speakers). In fact, persistent exposure to speakers at 90 dB or more has proven to cause progressive hearing loss. For comparison, conversations typically measure 70 dB; a chainsaw is 110 dB; a rock concert is 140 dB; and a rocket engine is 180 dB.