Penny: You know, we could've come to you guys. You didn't have to bring the baby here.
Bernadette: Oh, it's okay. It's good to get out of the house.
Howard: And the car ride puts her to sleep.
Leonard: Aw, that used to work with Sheldon.
Penny: Yeah, until someone left him in the drugstore parking lot and he freaked out.
Leonard: Who forgot to crack the window?