Why Porky Pig Stutters: Looney Tunes Finally Explains It In The Day the Earth Blew Up, the newest Looney Tunes movie, we finally learn the origin of Porky Pig’s famous stutter — and it’s all Daffy Duck’s fault. The film opens by revealing Daffy caused the speech quirk that’s been part of Porky for over 90 years. The story then follows the duo as they team up to stop an alien invasion in the first fully hand-drawn, feature-length Looney Tunes film ever made. | Did You Catch This?