James at 2010-02-23 11:31:57:

Chris Sparling - writer of "Buried" recently sold "ATM", the story of three people trapped in an ATM vestibule by a faceless killer.

The_High_Dweller at 2010-02-23 13:01:24:

Yet another example of why it's a good bet to invest your time in developing a strong concept for a contained thriller.

Christian H. at 2010-02-23 18:35:19:

There was P2 - in a parking garage.

There was Mirrors - mainly in a hospital (more horror)

Quarantine - apartment building

Any "haunted house" stuff.

judy at 2010-02-24 10:50:16:

Here are some nearly contained thrillers:

"Wait Until Dark" (1967) - mainly in a blind woman's apartment

"Vacancy" (2002) - mainly in a motel room