Claire: His door is still closed. What is he doing in there?
Phil: I think we both know what he's doing in there.
Claire: He's been at it for hours.
Phil: That's how I was at his age.
Claire: He's gonna wear himself out. You should talk to him.
Phil: I don't want to embarrass him.
Claire: So, knock first.
Phil: Maybe you're right. I don't want him doing it wrong and getting hurt. Luke? [knocks] I'm coming in. Hey, man. Buddy!
[Luke is wearing headphones and is practicing ballroom dancing]
Luke: Dad?! Get out of here!
Phil: Don't be embarrassed, son. It's perfectly natural!
Luke: Get out!