I've accidentally broke somebody's fingers once by showing them how to tie a knot
they then decided to put their hand in the knot during a summer camp, and it was something where there was a long rope to pull up a kid and make them suspended in the air, so full force of the kid pulling on either side of the knot -> collapse the knot -> pain (probably?)
I've really tried to work on spreading knowledge in safer ways since then, so people don't hurt themselves with it :I
User was banned for this post
turns out my reports for flaming actually do get seen by somebody
didn't quite expect a ban though