Ted: I am freaking out. I don't think I can do this.
Barney: Okay, look, mistake number 1 was taking that girl's question. You don't take questions on the first day. It shows weakness. Mistake number 2 was you should've hit that. Dude, your pants were already off, you had a classroom full of people to cheer you on, and you can't knock her up 'cause it's a dream. Class dismissed.
Marshall: Mistake number 3, dude, where was the hat? Cause if you're not going to wear it, I'm taking it back.