I saw this movie once maybe a year ago. A group of people dressed as painters walk into a bank and with something that looks like flashlights block out the cameras and take everyone hostage, wearing masks the whole time. What they end up doing is putting everyone into different rooms and rotating the hostages around, occasionally putting a robber into the room with the hostages so when they were all questioned later on no one could identify the robbers, they all got away. Also I remember they put up a wall inside is a room so another guy with the loot could live in the small space behind the fake wall for a month or something, then just walks out at the end of the movie. It was a good movie from what I remember and I'd like to watch it again actually paying attention this time. Does anyone know what movie I'm talking about? I don't remember what actors or any clue as to the name.