Brainstorming..any ideas???

Question

Okay so I'm writing this scene for this film thing where people get together and film scenes

and basically my idea so far is:

a group of people (or less depending) wake up in a room with blood wounds, they can't remember what happened, they can't get out...

so what I;m asking you is

who are they?

why are they locked in a room all bloody?

what do they do?

Answer 1

They all are extras willing to work for a film even it has good chances of being flopped.