It is a kind of knight's duel on the water: the participants try to push each other off the boat with lances. The jousting has been held every year in the southern French port city since 1666.
I happened to be in the right place at the right time. It's a great spectacle. You have to see it. The next time I'm in France 🇫🇷 I'll watch the whole jousting. Greetings Marcus