The two play a drunken practical joke on Frank by putting a toe-tag on him that reads "emotionally exhausted and morally bankrupt" before passing out.
The next day, Potter gets a call from a battalion aid station officer (Joe Morton) where Frank has ended up.
Shortly after they depart, word comes in that the area around the aid station is being shelled; the two doctors arrive at the height of the bombardment and help with a round of emergency surgery before taking Frank back to the 4077th.
Just after they return to the Swamp and pass out on their cots from exhaustion, Frank wakes up and tries to continue spreading the good cheer from the previous night, unaware of his trip to and from the aid station.
He resumes his annoying behavior, but Margaret's return quickly brings him and life in the camp back to normal.