One weekend, a week after a snow, I was training with a group at my office. The parking lot was clear and dry except for a ring of ice around the periphery from the plows. We were in the parking lot doing prowler pushes. Chaz brought a friend and the friend wanted to make an impression. One of the unspoken rules of survival for training was to do what you could do, find a bit of challenge, and call it a win. When somebody joined the group with a background of being one of the stronger people at their gym, they usually failed to understand that rule. They wanted to win that event and every event. They definitely needed to outdo everybody smaller than them much less smaller and older.
We were pushing the prowler sled about 100 feet. The new guy made his mark by pushing it twice that.
He made his mark because he was done for the day after that. His blood sugar and blood pressure went nuts. Nausea downed him like a tidal wave. If there was blood in his digestive system it got pushed to his working muscles. Blood pressure spikes to keep pumping blood through working muscles and then plummets when you stop. Your body struggles with trying to figure out where blood and oxygen need to go.
A better description would be he made his mark by vomiting three or four times around the edge of the parking lot burning a hole in the ice with the contents of his stomach and some stomach acid.
I would have understood if we never saw him again after that. But he did not give up. He did not come back for a few weeks but he did come back. That is how he truly made his mark.