The Foreshadowing: Ed outlines his masterplan for the next day as he and Shaun share a few jars in The Winchester. "A bloody Mary first thing, a bite at the King’s Head, couple at The Little Princess, stagger back here and bang… back at the bar for shots."
How It Pays Off: Turns out that's exactly what they do, in a manner of speaking. First off, they kill a blood-spattered girl named Mary. Then Shaun's stepfather gets his head bitten. Then they pick up Liz (Shaun's little princess) and another couple. Then they pretend to be zombies, staggering back to the Winchester, and finally end up behind the far firing off shots left right and centre! Now how's that for a slice of fried gold?