It's the involuntary action of the handsome stooge at the last panel that begs for pages 3, 4, 5 and however many more it takes with the delivery person.
This is a great comic - and a great concept. Can you imagine having a buddy you could just call up, then casually stop by, strip down to your boxers, and get pied in the face? (Also, it looks like maybe his face isn't the only thing Ryan wants to get pied.)