The first movie that comes to mind is none other than Inception.
And the number one image to perfectly sum up what got me thinking of that is:
Another movie that has the same surrealist/fantastic premise that occurs to men and women in business suits is a Brit flick released this year, Exam. The plot: a bunch of men and women applying for the same job are required to take an exam in a locked room, but the exam consists of a blank page and a pencil, and they are not allowed to utilise either one.
Sounds good? I've yet to sit down and watch it though I possess it. I should remedy it soon. =P