Snowball gets run over and it shocks Lisa. After the funeral, she gets sad and depressed and just gives up. She meets up with the bad girls in school and they give her something for the pain. The class is on a fieldtrip and Lisa takes the pill and goes to Disneyland. Her trip begins, the pain is relieved. And she wanders around aimlessly, continuing her trip, it leads her to a rooftop, and she falls off.