Synopsis

Boober has been experimenting with belouviouses – the sensitive fringes on a Fraggle's tail that stand on end when frightened. During one of these experiments on Wembley, the latter seeks retribution, and Philo and Gunge offer suggestions for testing his own belouvious. When simple tricks like hiding in the laundry and shouting "Boo!" prove ineffective, he devises a more elaborate scheme involving frightening masks, spiders, and snakes. He recounts his preparations to Philo and Gunge, and Marjor