Quote from Kramer in The Nap
Jerry: You're swimming in the East River? The most heavily-trafficked, overly-contaminated waterway on the eastern seaboard? Kramer: Technically, Norfolk has more gross tonnage. Jerry: How could you swim in that water? Kramer: I saw a couple of other guys out there. Jerry: Swimming? Kramer: Well, floating. They weren't moving much. But they were out there.