Personally I found the scene hilarious but I couldn't quite place why it seemed vaguely familiar.
Yesterday I was watching part of Angel Season 1 and I figured it out. In the third episode (Into Darkness of something like that) Spike and Oz (i.e. Seth Green) make cameos. Spike does almost the exact same routine with Angel and the cute blonde that he just rescued. Very funny there too.
As a bit of a technical theatre geek, it makes me wonder how things like that make their way into movies. Was the scene in the movie originally? or did Green suggest it early on in the development process? It's just weird since both scenes work to the exact same effect (making fun of the annoyingly handsome character) and they are amusing.
Eh, just some movie ramblings for your Tuesday.