When a month-long solar eclipse takes place in Under, it becomes overrun by Brain Suckers, turning all their victims into mindless drones. They can be 'resmartulated' with Vernon's solar powered Resmartulator, but Bob tricks Vernon into smartulating him without being brain-sucked first, making him a super genius (at least by Bob's standards) and able to successfully take over Under. To stop Bob, Russel also has himself super-smarted, but he becomes conceited and uncaring as a result.
