There is a game called "Duck, Duck, Goose." Everybody stands in a circle except for the individual determined to be "it."
The odd-man-out walks around the circle tapping each person sequentially and signifying completion of the tap by saying, "Duck."
At some point, instead of saying "Duck" he says "Goose". At that instant the individual tapped chases the tapper who runs around the circle and takes the place of the "Goose" (unless the goose catches him).
Joe Penner was a vaudeville comedian with a duck. His duck was nearly named "Goose".
Joe Penner's duck was named "Goo-Goo".
Quack, Quack!