It's funny because it doesn't rely on the stereotypical, preditable 'humour' which the majority of films do.
"Don't be jealous because I've been chatting to hot babes online all day"
"Can you bring my chapstick to school? But my lips hurt real bad"
"Eat it Tina you fat lard"
Just some of the many hilarious lines from the film...
By a route obscure and lonely,
Haunted by ill angels only,
Where an Eidolon, named night,
On a black throne reigns upright,
I have reached these lands but newly
From an ultimate dim Thule
From a wild clime that lieth, sublime,
Out of space
Out of time.
It was alright. Kinda funny, but not really anything special. The problem is that millions of retards who would never sit through an arthouse film if it was the only way to defuse a rectally-implanted explosive watched it because it was produced by MTV Films. Remember, MTV's so cool they decide what's cool.
I reckon it was a great film. It was kind of odd at first, but that's kinda what makes it good. It's humour is much different than most of the other standard crap we get on our screens these days. There are lots of memorable moments, characters and lines, which is a good thing. GOSH!