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How did dromaeosaurs use their arms?

 Dear all

Like birds, dromaeosaurs had wrists that could bend sideways to quite a great 
extent. In birds the sideways movement is critical for gaining the thrust that 
moves the animal forward in the surrounding air. Dromaeosaurs, in turn, are 
believed to have utilized the structure of their wrist when killing their food.

But how, actually? I myself find the movement pretty hard to visualize. As the 
dromaeosaur would have swung its hand forward in horizontal plane, the claws on 
the ends of the fingers wouldn't have pointed towards the pray animal, but 
towards the ground, right?
Soittoäänet ja ikonit matkapuhelimeen!  http://www.iobox.fi/