Trivia: In 'After School Special' Dean says the the regular gym teacher is getting married in Massachusetts. This is a reference to how female gym teachers are thought to be gay. At the time of the airing of this episode Massachusetts was the only state in the U.S. that allowed gay marriage.
Trivia: Dean dies 10 different ways in this episode. 1. Shot in the chest. 2. Hit by car. 3. Heavy piece of furniture dropped on head. 4. Chokes on piece of sausage. 5. Slips and falls in the shower. 6. Food poisoning. 7. Electrocuted. 8. Accidentally killed by Sam with an ax. 9. Attacked by a dog. 10. Killed by mugger.
Trivia: This episode is a nod to the game Clue. Each weapon appears in a shot. Dash grabs the revolver. Dean grabs the candlestick, wrench, lead pipe and rope. Phillip was stabbed by the knife. Also there is six people invited to the party, three men and three women, referencing the guests who usually attend the Clue game party.