When Barney is banned from Laser Tag, he plans to get revenge by TPing the Laser Tag center and asks Ted to help. Ted insists they are too old for that kind of a prank, prompting him to introduce Barney to his "Murtaugh List," a list of things the gang is too old to do. Barney is disappointed when he hears all the fun things that are on the list, and bets Ted that he can complete every item on the list in 24 hours. Meanwhile, Marshall and Lily coach a children's basketball team, and discover that they have very different philosophies when it comes to motivating kids.