My friend Dug North shared this video on YouTube at the request of another friend. It is unedited and a bit long, but it's a fascinating technique that requires only a knife and a segment of bamboo.

Like a lot of friction fire techniques, the prep is important (and a tad fussy) and it takes a while to get the hang of it, but it looks as though, once you learn it, it's really not that hard.

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https://boingboing.net/2020/03/30/how-to-build-a-fire-with-a-kni.html