“This is one of my favourite gags on The Simpsons EVER. At first it was funny, then it became stale, then when they drew it out even more it became HILARIOUS.” - Anonymous comment
Popularized by a gag in the 1993 episode “Cape Feare” of The Simpsons, in which Sideshow Bob, already injured, accidentally steps on several rakes, causing the handles to hit him in the face.
I think it’s funny to consider, in jest, saying to someone, “Go step on a rake.”
Sideshow bob stepping on rakes - YouTube
Simpsons Cape Feare Highlights - YouTube