While on the subject I would wish to make some comments on the idea dromaeosaurs hung onto their prey.
Dromaeosaurs lack mobile shoulder and pectoral girdles.
Their entire shoulder girdle was immobile. It was braced by the interlocking coracoid and sternum, furcula, and strut-like coracoid. This condition is strangely like that of birds, animals that use their forelimbs frequently and for extremely musclary stressful times of flyng. Dromaeosaurs also had bird-like forelimb muscles. The presense of a furcula shows dromaeosaurs had a pectoralis muscle, the muscle that gives the power stroke in flight.