Cultural Reference: Ace of Spades
At the end of the teaser, Mr. Burt is turning over cards, naming the cards just before they're shown. A woman enters the room screaming about a murder, and the final card Mr. Burt turns up is the ace of spades. In divination with standard playing cards (as opposed to Tarot) the ace of spades is the death card. This card was placed on the foreheads of killed enemy combatants during the Vietnam War.