April Fool!. It's April Fools Day and Old Tom and Lucy play a trick on Billy, who tries to get his own back. Instead, he meets Angela and tricks her into believing that a flying saucer is about to land in the park. Alarmed, Angela races through the town warning everybody. Meanwhile, Billy finds Old Tom and Lucy at a pizza parlour and manages to get them thrown out. As they leave, the big, pizza-shaped signs falls off the building and collects Old Tom as it starts to roll down hill. Meanwhile, at the park, Billy is about to tell Angela that he tricked her about the flying saucer, when the runaway pizza sign bounces off a rock and flies overhead. Everyone thinks it's a flying saucer, and Billy's trick backfires on him.