Rip a pop-can in half with your hands
Ripping a pop can in half with your bare hands is not all that hard if you know a bit of chemistry and a little about how soda cans are fabricated. The key, is the plastic liner that coats the inside of the can. In order to protect the aluminum can from the carbonic acid in sodas, can manufacturers coat the inside of a can with a plastic liner. The liner also protects the inside of beer cans as well.