 He also has an evil twin brother called Professor "Spiffo" Nebulous, who is his physical double apart from having a moustache, being somewhat overweight, and lacking both thumbs (due to a freak Game Boy accident).The twins had a dimmer brother named Mofo, whom Spiffo killed in a knife-throwing incident.Originally Nebulous was happy being a clown and put all his time and effort into it, until he met his future self, who convinced him to become a scientist.