Slap Happy Lion  Slap Happy Lion is a 1947 American animated comedy short film directed by Tex Avery and produced by Fred Quimby for Metro-Goldwyn-Mayer. Released on September 20, 1947, the short details the tragic downfall of a lion from king of the beasts to a gibbering, pill-popping wreck. It is narrated by a mouse whose torments drove him crazy. The mouse's voice was supplied by Frank Graham. Scott Bradley provided the music. The closing title in the re-issued version does not display the regular MGM card, and erroneously uses the "Tom and Jerry" card instead. This might indicate that MGM made a mistake when reissuing it. The lion's design served as the inspiration for Genghis from "The Wacky World of Tex Avery". Outside the Jingling Bros. Circus (a parody of the Ringling Bros. Circus), a hospital ward clerk hauls out the lion in a wheelchair who has had a nervous breakdown. Watching this, a mouse expresses his disappointment about the lion being "mouse shocked" and then tells about what happened before. We are then given a flashback about the lion being king of the beasts, because all the animals are scared to death of the lion, who roars and gets everyone out of his sight. His loud roar frightens every last animal, including a gorilla who screams, shrinks down in size, and runs off. Then one day, the lion meets a mouse, who says "Boo" and makes the lion double take and feel scared and scream two times at him. He hides up a tree, feels frightened, and comes down from the tree, but stands up, and roars at the mouse, who unfortunately proves to be tougher than him. The lion catches the mouse, and tries to eat him, but is so distracted of doing so that he doesn't realize that when he fails to notice that he is missing a tooth, which fell out of his mouth from a gum between the rest of his teeth, that the mouse is hiding in after he walks into the wrong direction into the lion's mouth, it is too late. The mouse then gets out of the lion's mouth and rolls out his tongue like a window shade. The lion tries swallowing the mouse, who finds himself inside the stomach. As he finds two bones, the mouse plays the ribs inside the lion like an xylophone. The lion tries to kill the mouse by swallowing a lit bomb. When the mouse sees the bomb inside the lion's stomach and screams, he escapes the lion's mouth again and flees from the beast.