Uh, Dave, are you sure you have the right forum?
Fire by friction we sometimes talk about, but from fingernails... no.
If we talk about self amputators like the guy who got pinned climbing, it's usually mockingly and then someone makes a pitch for PLBs.
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-IronRaven
When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.