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The guy's blood tested clean. Therefore, his belligerence was most likely the result of a mild head injury sustained in the fall. He fell 30 ft! I'll bet that he was concussed into next week, and his responses were being driven by the lymbic ring, which was in control until he regained full consciousness. Thus, his baser instincts were more manifest.

Belligerent and uncooperative behavior are very common when a patient has taken a severe blow to the noggin. When higher functions are restored, behavior returns to normal.