Things to do in the water other than "just swim laps"

Here are some things I'm particularly enjoying: -- doing a deep dive off the board, trying to touch then bottom, and then dolphin kicking back to the surface -- doing a bunch of flip turns in a row "on the spot" in the water, rather than off the wall -- anything involving attempting to recover an object (e.g. brick) -- anything involving a pole What are your little quirky things? Or is everyone here so busy training that no one has any fun in the water?