Marshall: It was so hard to watch, Robin. You're usually so cool.
Robin: I don't know what's wrong with me. I'm sitting next to Simon, and suddenly I'm 16 again.
Ted: Oh, it's actually a common thing. When you're around someone from your past, you kind of revert back to who you were when you knew them. There's not really a name for it, though.
Marshall: It's called "revertigo."
Ted: Yeah, I don't know about "revertigo."
Marshall: You know who gets really bad revertigo? [whispers] Lily when she around her high school friend, Michelle.