Quote from Future Ted in The Magician's Code - Part Two
Future Ted: [v.o.] It was a beautiful moment. But then a thought popped into my head, kids. The same thought that will pop into your heads the first time you see your best friend holding their baby. [flashback to Ted and Marshall's college dorm in 1996. Marshall is holding a staple gun while Ted "eats a sandwich":] Marshall: Wonder how much this would hurt. [screams] Future Ted: That guy's a dad.