If you jump off a bridge in Paris... You are in seine

A tourist is walking along the riverbank in Paris when a Frenchman runs and pushes him in. Spluttering and angry, the tourist shouts ""Are you crazy?"" To which the Frenchmen replies laughing ""No, but you're in Seine""

I went on a boat trip around Paris, ...it was in-seine!

During My Trip to Paris While I was in Paris, me and my friends decided to go for a swim during an awfully cold day. We went down to the river, and as I waded in the water, I called my mom to tell her what I was doing. She replied, ""What are you, in Seine!?""