Ted: Now, Marshall, the story of how you asked out Lily is super sweet.
[flashback to Lily arriving at her college dorm room, where Marshall plays a guitar in the dark:]
Marshall: [singing] Lily, how you thrill me but it may just even kill me If you do not say "I will-y" to this question Will you go out with me?
Lily: I will-y.
[present:]
Ted: Dobler. But if Lily wasn't into you?
[fantasy scene of Lily arriving at her college dorm room, where Marshall plays a guitar in the dark. This time, Lily maces him.]
Ted: Dahmer. Whether a gesture's charming or alarming, depends on how it's received.