Will: Slow down there, Augustus Gloop. You don't want to get sucked up into the pipe.
Will's crack to Grace as she is testing each of the wedding cake samples refers to the winner of the first Golden Ticket in the movie Willy Wonka & the Chocolate Factory. In the movie, the boy was shown to have a voracious appetite. He eventually fell into the chocolate river and was sucked up through the filtration pipes to the fudge room.