It was now afternoon and the four were currently in McGonagall's class, watching as they learned how to turn a piece of clothing into furniture.
"Why make a coat into a coatrack? Seems counterintuitive, doesn't it?"
"Shut up, Remus." James remarked, and McGonagall didn't notice them for once. At this moment, Peter raised his hand.
"Yes, Mr. Pettigrew? You have a question about the lesson?"
"Actually, I just need to be excused for a moment. May I use the loo?"
"Very well, but hurry back." Peter nodded and then walked out, but not before James stealthily whipped out his wand and zapped Peter without anyone noticing.
Peter made his way to the loo, and entered the stall. After about three minutes, he flushed the toilet, only to feel a strong wind in the stall.
"Hey, no fair! We agreed, no repeats! I understand getting even James, BUT NOT LIKE THIS!... I'm stuck."
It had been five minutes, and McGonagall knew that meant trouble. Peter was either dead, delayed, or being prankful. She hoped it was the second. And a little for the first, but only for a moment.
"Excuse me, students, I will be back. Turn to page 58 and read the chapter. I won't be long." With that, everyone opened their books, and McGonagall walked off toward the lavatories. When she got there, she heard a grunting noise coming from inside one of the stalls, and looked to see Peter stuck to his waist in the toilet, as if he was sucked in.
"Care to explain, Mr. Pettigrew?"
"… Make sure people don't use this stall anymore. The commode's got quite a flush."