How I Met Your Mother, Season 6

[Ted is roused by someone from his bed and is startled at who it is]

Ted:
Barney, what are you doing here?

Barney:
[in aristocratic voice] Who is this Barney? My name is John Clifford Larrabee, architect of the Arcadian, and I'm visiting you, in a dreeeeaam.

Ted:
Really, because it looks like my insane friend rented a costume and broke into my apartment in the middle of the night for what I wish was the first time.

Barney:
[normal voice] It's a dream, it is, so… [assumes aristocratic voice again] Theodore, do not try to save the Arcadian.

Ted:
Barney, there's condoms in the drawer, just take it and get out-

Barney:
I am not Barney!!! [activates flickering lights]

Ted:
Whoo, lighting change!