As we saw in the previous episode, Jack decided to take Kate’s advice and go see Rebecca’s first performance on tour.
So, he shows up at Rebecca’s gig drunk, and then quickly proceeds to get even more drunk at the bar while there.
Unfortunately, Ben makes a poor choice in words which reveal to Jack that he’s stepped over a line with Rebecca and, of course, Jack punches him and begins to beat the ever-loving snot out of him.
Just as some men are pulling the two of them apart, Rebecca walks in, and she is not pleased.