It's just another job for the Ghostbusters. Peter starts off by checking the bathroom before suiting up to leave on a call. But five minutes of sitting on the toilet and nothing coming out, he looked at his watch and just gave up on waiting. Taking a crap will just have to wait. He pulled up his pants and decided to suit up.
While in the Ecto-1, Peter was starting to feel pressure in his abdomen. He decides to distract himself by starting a conversation.
Peter: So, where are we going?
Winston: Haunting at the Luxury Apartments on Washington Street.
Peter: Oh, what fun.
Arriving at their destination, the Ghostbusters make their way in building.
Egon: I suggest we each take a floor and search for the ghost.
Ray: We will all have our own PKE meters.
Now with each ghostbuster taking a floor with their PKE meters, Peter takes the third floor by himself. He gets the sudden urge for a bathroom. Peter looks around before making the decision to no longer hold in a weeks' worth of poop. As Peter pushed, a long, soft poo emerges from his anus and curled up in the back of his briefs, nestling against his buttocks.
Peter smiles at the feeling and pushes again, squeezing out a second turd into his briefs. This one was longer and thicker than the first, but he could feel that there was more to come. He strained again and a third turd began to come out. There was little room for it in his overcrowded undies, but he continued pushing and the back of his briefs sagged lower and lower. The new turd finally broke off, but Peter looks around before feeling his backside and feeling how big of a mess he had made.
Peter: Dammit. No one is gonna believe this was an accident.
He is started by the sound of his radio.
Winston: Peter, come in.
Peter: What do you want, Winston?
Winston: I got a situation on the second floor. Can you help me?
Peter: Have you contacted Ray and Egon?
Winston: I did and they're preoccupied.
Peter: Okay. I'll be there as soon as I can.
Peter dreaded letting Winston see him like this, but he hopes that the bagginess of the jumpsuit would cover up the bulge. Peter didn't think that once he caught up with Winston, that he would sniff the air.
Winston: What took you so long, Peter? And what's that smell?
Peter's face turns red, but he couldn't lie.
Peter: I had an accident.
Winston: Accident my ass, Winston. You had plenty of times to use the bathroom.
Peter: I wouldn't judge you if you shit yourself.
Winston: Let's just get this ghost and call it day.
While catching this ghost with Winston, Peter couldn't wait to actually sit in and enjoy his mess while getting into the Ecto-1 and getting back to the firehouse.