Being rated, 1700 I played against a 1880 and he lost essential material. He shot down all the pieces and they fell on the floor.
We were playing om four boards, it was a club match, and my club partners and oponentsopponents were amazed because of the noise.
After that, we were winning the match 2-1. It was last round and we were virtually classified for next league, while the club of this guy was not going to promote to next league because they needed to beat us at the match.
The last game ended on a blunder of the player of the club of my angry opponent, so we won 3-1, classifying ourselves.
He started to shout to his club partner: "How can you play that?"
I felt a lot of embarrassment. He had the eyes flushed.
I go to tournaments for fun and because chess is good for my brain; I don't understand why some people take an amateur sport so seriously.