Gus, the famous obsessive-compulsive swimming polar bear of the Central Park Zoo, seen here doing the flip around after doing the backstroke.Gus spends all day, every day, swimming back and forth in his enclosure. Breast stroke, dive, flip, backstroke, dive, flip...Some Years ago, the Zoo hired a psychologist to try and treat him. He still swims back and forth all day long but he does seem less tense somehow.