We all know that one guy that shakes your hand with the jaws of death and tries to crunch your bones just for fun. You can keep your hand intact by touching their wrist with your index finger.
Photo by D. Hendrix.
Touching the inside of their wrist with your finger helps align your knuckles in a way that won't crush them when they start to squeeze really hard. Of course, if someone's squeezing your hand too hard, they're probably doing it on purpose, so you should call them out on their tomfoolery. If they're particularly annoying, however, this trick should help save your bones from grinding into dust. Hit the link to read more.