personally i haven't seen the movie yet, my mom has, and it's intrigued me a lot.
she doesn't remember the name nor director or any actors in it.
this is what she knows:

it's about some people who take a bet in staying in an abandoned psychiatric hospital, and they get millions if they make it out alive. naturally, the place is wired with traps and only to people survive. at the end, those 2 are leaning against a door, a note gets shoved under it, saying they are on the roof and if they want to get out alive, they have to go through all the traps again.

it's not cube, i definitely know that, but i have no idea which other movie it could be.

can anyone help?