The dead have risen. You've found cans of tuna and old Mosin-Nagant ammunition. That's wonderful news!
. . . or it would be, if you had can opener.
Now what? Well, YouTube user CrazyRussianHacker has a trick that will let you open those vital consumables. All you need is a block of concrete. Rub the top of the can against the concrete until you've abraded away the top rim. Then squeeze on the sides. The lid will pop off.
-via Ace of Spades HQ
If you squeeze it hard enough, you don't need the concrete. Like Popeye.
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I wouldn't suggest this, as 1- it probably takes several minutes to open the can and 2- because you erode the top rim away, there's a good chance that you could have metal filings in your food that will literally cut through your digestive system. In short, at the end of the world, have a can opener.
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Any smart survivalist should have a P-38 can opener. I've had one (a P-51, slightly larger version) on my keyring forever and it's come in handy a bazallion times for opening cans, boxes, you name it.
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