But the ball has been set in motion.

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After the ball is snapped and the play is in motion, offensive players are running the play while the defensive team is reacting to it.

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The system uses two Kinect cameras to detect ball movement, which in turn directs the motion of the projectors -- not entirely unlike those floor shows in malls that seem to endlessly fascinate small children.

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For example, a bowling ball causes a dent in a mattress, and that dent changes the otherwise straight motion of a nearby marble on the same mattress.

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They were able to model the motion of the wheel and ball and were able to confirm their predictions both in simulation and using an actual roulette wheel.

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Picks for best actress in a drama motion picture went to Kidman, Halle Berry ("Monster's Ball"), Judi Dench ("Iris"), Sissy Spacek ("In the Bedroom") and Tilda Swinton ("The Deep End").

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