Tom and Jerry began as MGM theatrical shorts in 1940, created by William Hanna and Joseph Barbera, and Tom's screams became one of the series' signature noises. Hanna himself voiced many of those yells, stretching a single shout into the panicked cry heard in countless cartoon chase scenes. The shorts later ran for decades on television and were clipped endlessly online, where this scream was isolated as 'grito tom' in Portuguese speaking communities. It survives because it instantly signals cartoon pain without needing any setup or dialogue.