My first year, mid winter, cutting line with mostly sharp machete and same thing… but not kneecap. Left shin. Through 3 layers of socks and pants 2 pair longjohns. Pretty deep but it was cold and hardly bled. Hurt for a minute. Cut the top off my sock and wrapped it with flagging, worked rest of the day. That night I figured I chipped my shin cus it was throbbing bad. Next morning I butterflied it and put a 3” on top. Went to work… guess you gotta be a certain kind of crazynuts to be a surveyor lol!