Jinkies! Shaggy was visiting Velma's for the day and shared some of his Scooby Snacks with her, unbeknownst to her recent gastro pains. Unfortunately, they didn't sit too well in her gut. Both could hear her stomach groaning throughout the afternoon, no doubt a deadly gas was brewing inside. Velma knew that she had to get her friend back for feeding her those rank biscuits.