Need an alternative source of heat in a pinch? Look no further than a can of tuna. In a survival situation, or even if the heat goes out, this trick from Crazy Russian Hacker is a great one to try out. All you’ll need is a can of tuna in oil, a couple of sheets of toilet paper and a lighter or matches. You’ll be able to create a “torch” of sorts that will burn strongly for at least 30 minutes. Here’s how it’s done: