I was attacked by 4 assailants with knives when I was in highschool. I was on my way home from doing a roofing job. I had a roofing hammer. At first it looked like they had guns due to the way the closest one was holding his knife, and it was dark in the middle of BFE.
I fought them off, and they fled, I wound up with 17 stab wounds. One of those wounds if it had been just a quarter inch deeper it would have collapsed my lung. I gave more than I got, though try walking over half a mile with 17 bleeding wounds. I did not know I was stabbed at first, till I looked at my shirt and saw the blood.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.