Towards the end or the "Scrub Day" episode where Larry Beal and the rest of the 8th grade are all going after Louis and they finally catch him. Watch when they put him in the big pot of sloppy joe goo. He starts dancing around in it and after a few seconds it cuts to a shot where his head is covered in goo and some is on his face. He could have just dunked couldn't he have? Well, then how did he go from covered to just up to his shoulders again just moments later, and stay like that for the rest of the show. I don't think he could have wiped it all off, washed his hair, face, and only part of his clothes in a matter of seconds do you?

It's pretty obvious, if they wanted him to be covered in the stuff, then why did they "magically clean" him up again?