Teaser: Jesse is weight training with Michelle "Superbaby" Tanner. Main Synopsis: While Danny and Jesse are out, Joey is left in charge of the girls. D.J. and Stephanie want to stay up late so they can watch a Tiffany concert on TV. When Danny comes home and sees that they are up late watching the concert, Danny tells Joey that whenever Joey is at home alone with the girls, he needs to make them follow the rules of the house, so on the next day, D.J. arrives home from school an hour late without telling Joey that she was with friends, practicing for an hour for an upcoming karate tournament, and Joey grounds D.J. -- for the weekend when the tournament is scheduled to take place. D.J. becomes furious, angrily reminds Joey that he's not her father, and then storms off to the bedroom that she and Stephanie occupy. Later, Joey goes upstairs to the bedroom, where he explains that after school, during the hour when he didn't know where D.J. was, he was scared to death. D.J. agrees that she