I've done this when I switched to 12C from 11B for a time.
Let me just say that those jet-powered boats used to push the ribbon bridge around are AWESOME. They can vector the trust beneath the boat, so you can literally lift the ass end on the boat up out of the water.
For a really good time, get some speed up, THEN vector the thrust straight down. Suddenly the nose is plunging into the water.
Two tons of fun.