Roger is brought into his (male) coach's office for a chat. He is asked to remove his shoes and socks and he also takes off his shorts and sports jacket, leaving him in just his wrestling singlet. He props up his feet as his coach asks him how he thinks the season is going. It turns out Roger has been cheating! He fervently denies this, despite the evidence against him.
Coach is left with no option but to punish Roger. He points out that Roger is actually sitting in a gunge tank! Roger decides to take the punishment over being kicked off the team. He gets covered in litres and litres of blue gunge, released like a torrent over him!
Coach decides the gunge hasn't covered Roger enough, so he calls for a second gunging! Roger objects but the gunge comes down again, just as he is looking upwards and happens to be holding open his singlet! His face is covered and his singlet crotch fills up with a big bulge of gunge!
Finally, coach decides Roger has been punished enough, so he ends the meeting and leaves. Roger sits down on the gunge tank floor, playing in the gooey slime and rubbing it over his feet for the last moments of the movie.
Caveat: the gunge in this movie is slightly thinner than our usual standard, although it does work for a good punishment! It was Roger's first gunge tank experience, and he thoroughly enjoyed it!