Quote from Barney in The Time Travelers
20-Years-From-Now-Ted: Ted, listen to me. You, listen to you. Me. You got to go to Robots vs. Wrestlers: Legends. Trust me, you will regret it if you don't. Barney: So, what, do I go bald or something? Is that a toupee? Ted, scalp check! Ted: Can't Robin do this? Barney: Come on, you've been doing it for years. You know the frame of reference. Scalp check! Robin: [from across the bar] Hmm, that's odd. Little early in the week for scalp check.