The Setup: With the blind man incapacitated by the alarm, Rocky beats the crap out of him with a nearby crowbar. She gets in a bunch of solid hits, and then he falls into the basement, on his back. Seems like he's dead, so Rocky makes a run for it before the police arrive.
The Seventh Twist: Any horror movie buff will know that it's almost impossible to kill a villain. The blind man isn't dead after all. Rocky may have made off the with money, but if the blind man is still alive, can she ever really be safe? Sounds like a sequel, if you ask us.