Alaska (1930)

A Walter Lantz's Oswald cartoon where he's looking for gold but soon becomes a gag fest with a singing waiter who ends his verses with someone "who cannot leave his mother", a piano player who keeps chugging beer, and Oswald and his peg-leg buddy (probably Peg-Leg Pete who eventually became Mickey's nemesis) saying in unison "Pop Goes the Weasel" with the rabbit getting the better of this buddy after he keeps hitting him.