Mr Floppy Fun Pants was a clown whom Harry Pike hired to come to his son Darius's sixth birthday party. The young Darius was terrified by his antics. He later said it was the worst birthday party he ever had in his life. This fear was exploited by the Bodach, who gave him a dream in which he was locked in Mariah, his antique car, with Mr Floppy Fun Pants and three robot clowns. (TV: Dream-Eaters)
Darius dreams of Mr Floppy Fun Pants (middle) and his clowns