Phineas and Ferb are riding to Washington, D.C. while Dipper is reading his book. They stop when they see him in the middle of the road. He moves out of the way but Waddles runs outside towards the car while Mabel chases him. They stop again, and Mabel realizes that their mom was Lindana and Mabel asks if they want to stay for a while. Phineas thinks somehow he knows Dipper, Dipper thinking the same thing. Phineas tells mom to say yes, so she does.When they met they sniffed each others butts.