In the dream, he's walking through town alone. Suddenly, he realizes that his leg has been amputated and he's wearing a prosthetic leg. Not remembering the details of how he lost it, Judd panics, like you do.
He wakes up and gets ready to the sound of Philip and Tracy noisily making love.
As if that weren't TMI, his mom comes by his room and tells him way too much information about her and his father's sex life.