Former "Mystery Science Theater 3000" stars Mike Nelson, Bill Corbett and Kevin Murphy continue their assault on educational shorts from the 1940s through the '70s that offer helpful insights on bicycle safety, personal hygiene and popularity. Get a blast from the past with "Lunchroom Manners," "Each Child Is Different," "Harm Hides at Home," "Coffee House Rendezvous," "Good Heath Practices" and the inexplicably titled "Cathy-Petaluma Chicken."