[ChEEbA]

Hey all...
The movie I'm looking for is a slightly comical murder mystery/thriller. There's only a few elements I can remember -

*The main character was male, and his profession was something to do with movies/tv series, perhaps he was an extra, or a stuntman, maybe even worked cameras, I dunno.

*There was one scene where he was inside a coffin.

*The movie within the movie they were filming was a murder/thriller kinda thing, and elements of the movie began actually happening.

*Towards the end, it was like he "woke up" and he'd imagined the whole thing, I think this had something to do with the coffin scene, like, he may have been knoked out the whole time?

I remember it being quite funny, but had a few good scares too...well, at least I thought so when I saw it, at the age of like, 15-16. Wouldn't mind seeing it again...if anyone can help, that'd be cool...