Have you ever been caught with nothing to eat but canned soup or tuna fish and no can opener in sight? In this video, AJ Conover demonstrates how to open a can with a hammer and nail. First make sure the hammer and nail are very clean. Use the hammer to lightly pound the nail into the can's lid creating holes. Be careful not to pound too hard and drop the nail into the food inside the can. Hammer enough holes to make an opening around the edge of the can's lid and then pry the lid up and open enough to pour out the can's contents.