I mean, yeah, I'm sure that Python and the other things have paved the way for a greater understanding of the British sense of humor, but I don't think it's all that different than the American sense of humor. ↗
That's what we wanted to get across in that moment, particularly when Shaun goes to the shop when he's all hung over. He doesn't notice any of the zombies around him just because he never had before, so why should he at that point? ↗
There are a lot of visual marks that have to be hit, and lines that need to be said in a right way - so there wasn't really any improvisation on the set when it came to the bulk of the script. ↗
There are actually quite high profile British TV star cameos in it that you probably wouldn't even notice, that the British wouldn't even notice, let alone the American audience. ↗
It seemed to me you could do anything in comics. So I started doing my thing, which is mainly influenced by novelists, stand-up comedians, that sort of thing. ↗