A man with a large penis stands in-between carriages on an express train. As the train goes past a station, he hangs out his erect penis, turkey-slapping any commuters standing in front of the safety line.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.