Marshall: Oh, God, guys, I'm still really hungover. Did I really ruin a wedding?
Ted: No, you didn't ruin a wedding. Just the reception.
Robin: And the bar mitzvah next door.
Lily: And my dress. And your dress. You put on a dress at one point.
Marshall: Okay, you know what, that's it. I'm about to be a dad, and I want to be the kind of man that my child can look up to. So, sweeping declaration: I am never getting drunk again as long as I live. [all laugh] I'm serious.
Future Ted: [v.o.] Kids, it's not that your Uncle Marshall had a drinking problem. But whenever he made a sweeping declaration like that, you pretty much knew...
[the next day:]
Marshall: [slurred]: I did it again.
Future Ted: But I'm getting ahead of myself.