Tom & Jerry (Chuck Jones era) S01E01 - Pent-House Mouse

Tom is relaxing in a penthouse, while Jerry is struggling to look for food. Suddenly Jerry sees a lunchbox at a 125-story skyscraper construction site and jumps into it, eating through to it. However, the steel beam on which the lunchbox is sitting is lifted into the air and the box slides off and lunchbox then falls onto Tom's head.