Does anyone know the title of this movie? Is there a link?

[Necropolis]

Hmm, trying to find the movie clip where one guy snuffs another on stage in front of a screen where a sex flick is being shown.
I'm sure I saw it on this site, so I guess someone in CDG will know.
What is the film this clip is taken from? I think I should know the answer to this one - but help me out if you can...
Thanks guys!