Billy- I don't spend any time at all crushing beer cans on my head, but I read in bf's copy of maxim that you are supposed to indent the sides a little first therefore allowing it to crush, if you don't the straight sides act as reinforcement against each other to keep it stable. So next time you want to impress your friends give it a good sqeeze before it reaches your head so the sides are already squeezed in. Hope this helps!!!!!
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