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There is a surprising amount of energy in food. It's also possible to make a thermic lance using materials such as spaghetti or bacon:

It seems like one of those things that shouldn't be surprising. We eat food for the calories, the same ones that feed the fire.

There's a snack food in Finland called Hot Rods that ignite pretty easily with an ordinary match. It grosses people out but hey, that's calories !

You can do the same thing with Cheetos. They're great as kindling for starting campfires.