Here's what Jessie had to say about this scene when it was first released in 2011:

" (After filming and getting messy already) We had some gunge and chocolate left over, so Cheery had an idea! She really wanted to do some head dunking, so that's what we did! Lacey and I dunked our heads in chocolate, and Cherry in green slime! We also had a few pies left so played with those and the finished off the gunge by pouring it over ourselves and each other! "