The thirteen Tom and Jerry shorts made by the Czechoslovakian director Gene Deitch are infamous for their poor quality and rather disturbing nature, featuring badly done sound effects and animation and having a more realistic feel to the violence. Some have speculated that Deitch didn't like the concept behind Tom and Jerry and was pressured into making them, and wanted to make the people who watched his take on it feel bad for liking the concept. "DON'T YOU BELIEVE IT!" Credited to [KI Simpson ]