Simpsons, The Easter Egg - "The Hitman"

When Mr. Burns has to move out of "the bank's house", a professional wrestler is being shown around it. The estate agent (realtor) says to him, "Plenty of closet space makes this a perfect house for you, Hitman". There is a professional wrestler known as Bret "The Hitman" Hart in real life. He even looks like the pro in The Simpsons too.