Reminds me of the Seinfeld episode.
Young boy: Hey, there's a man swimming in the water.
Father: No that's probably a dead body son. You see when the mob kills someone they throw the body in the river.

Jerry: How could you swim in that water?
Kramer: I saw a couple other guys out there.
Jerry: Swimming!?
Kramer: Well floating. They weren't moving much...but they were out there!