I never out in a stint as a sushi chef, but I did get into a friendly sword fight with a sushi chef in the parking lot behind the restaurant one night in 1990 -- back when I was studying the Korean zen sword art of Shim Gum Do.
I was a regular customer at the Sho Gun restaurant back then, and got friendly with the chef. It turned out that he had been a student of Kendo (Japanese Sword), and one night we decided to go at it with a pair of wooden swords during his break to compare styles.
I don't know if it's fair to say that I won the encounter, but he quit before I did.
Arioch7 out.