Mickey's Circus is a Mickey Mouse short released 1 August 1936.
Mickey Mouse is hosting a circus featuring Donald Duck and a trio of sea lions. Children from all over come to see the circus. After Mickey introduces the performers, the show starts. Donald enters the ring only to be stampeded by the sea lions and a young sea lion pup. The first act is juggling, in which the sea lions and Donald juggle balls that land on their noses. When the stunt is finished, the sea lions beg to be fed, throwing their balls at Donald and pointing to their mouths. Before Donald can feed the last sea lion, the pup intervenes and steals the fish. The resulting tug-of-war ends in the sea lions fighting over the fish. The next act is playing the organ pipe, but the sea lion can't do it right. The pup interferes and plays the tune "Yankee Doodle" instead, but the crowd cheers anyway. The pup distracts Donald to the point where Donald loses his temper, tries to attack the pup, and gets stuck in a drum. Donald regains control by driving away the sea lions with his pistol.
Subsequently, the sea lions refuse to perform unless fed first. When Donald gets out a fish, the sea lion plays the tune rapidly. Again, the sea lions fight over the fish, destroying the organ pipe and ignoring Donald. The pup steals the fish again and Donald chases; there follows a fast chase around the arena, which includes Donald chasing the pup through a cannon and Mickey attempting to intervene. The spectators fire the cannon, shooting Mickey and Donald out and resulting in Mickey landing on a tightrope and Donald hanging from a hook within the fish basket. When a spectator cuts Donald's basket loose, he falls, lands on a circus bike, and rides across the tightrope toward Mickey (who somehow gets out of the way). The spectators oil the rope, causing Donald's bike to run backwards and splatter Mickey, go over Mickey's pole, bounce back from the start, and end up on top of Mickey's pole. When the spectators throw a barrel at Mickey, Donald's bike is bounced off but Donald gets back by driving through thin air and Mickey is loaded on as well. The spectators turn up the voltage to high, electrocuting Mickey and Donald and splitting the bike (and rope) in half, causing Mickey and Donald to fall. The two land in the seal tank, only to be hit by a fish thrown by the pup, and the sea lions beat up Mickey and Donald as they fight over the fish in the tank.