Marshall: You're seriously questioning our wedding vows? Us? Uh, we're adorable.
Lily: We're Marshmallow and Lilypad, bitch.
Barney: Okay, I'll give you this. Your little pre-wedding wedding out by the tree, you said some very sweet stuff. Hell, Ted even cried. [scoffs] Ted. But later, at the actual wedding...
[flashback:]
Marshall: Lily Aldrin, I vow to be there for you in sickness and in health.
[present:]
Barney: Hate to tell you, Lilypad, but Marshall has since confessed to me that en route to your honeymoon...
[flashback to Lily throwing up on the airplane as Marshall sleeps in the seat next to her:]
Lily: [retching] Oh. Oh, God.
Marshall: [snoring]
[present:]
Marshall & Lily: You son of a bitch.
Barney: Do you deny it?
Marshall: Lily, you know I'm not a vomit guy, and I just thought I should give you your space. Like a dying cat.