The Muppet Show - 213: Rudolf Nureyev - Backstage #4 (1978)

Backstage, Miss Piggy is very excited for her upcoming duet with Kermit, certain that it will be a mature and passionate love duet. Kermit informs her that she will not be performing it with him, but with Rudolf Nureyev. Piggy immediately drops Kermit to find Rudolf, running the frog over in the process.