Following the scene where Dymphna lost a vote against Luna, and was wrapped in cling-film (saran wrap) and trashed with Tomato Ketchup, Mustard, Relish, Soup, Refried Beans, Pasta Sauce and more...
In this scene the customer decides that revenge is in order. Robyn is chosen to do the honours, and, after being told to do a quick boob flash, Luna is wrapped in cling film.
She begs for Robyn to avoid her expensive new hair do, and so in the first half of the scene, Robyn plays along and Luna is trashed with Tomato Ketchup, Mustard, Relish, Refried Beans, Pasta Sauce and Guacamole.
Then after Luna has washed the mess off, removed the clingfilm, and got clean... and is convinced her expensive hairdo has survived, Robyn ties up Luna, gathers up the sloppy seconds and dumps them over Luna's head. How Evil! :) :) :).