Jack wasn't in anything fancy, just jeans and a sweater. He was still reeling from his argument with his father, so he spent a lot of time filling people's drinks and sorting out the DVD player to play a handful of background movies: Monty Python and The Holy Grail, Ghostbusters and This Is Spinal Tap. Jack doesn't dance without causing an incident, so he stayed off the dance floor, and then made sure everyone got home ok.