Tom & Jerry (Chuck Jones era) S01E03 - Is There a Doctor in the Mouse?

Jerry mixes and drinks a potion as the title card and credits are shown. After Jerry drinks the potion, he discovers that it gives him the power of superspeed; he tests this out by eating Tom's canister of sardines, along with the last bit of gravy and bits of his skin. Afterwards, Tom initially assumes that a ghost was eating his food, but concludes that it is a bug equipped with a jetpack and chattery teeth.