At the very begining of the movie there is a bank robbery and the manager (Rebecca Hall) is taken hostage, she is blindfolded on screen and left on a shore once the bad guys escape, once she is left you only see her back.
Later on the film this scene is repeated, now you see Rebecca's front and you can see that besides being blindfolded she also has her hands loosely bound in front with plastic cuffs.
Kerri Dunbar is the girlfriend of a drug dealer arrested by the FBI, when the agents trap the dealer she is also captured and she is seen sitting on a chair with her hands cuffed behind her back, she is wearin only her underwear.