Police respond to scene of motorcycle crash on highway off-ramp. Driver refuses medical attention, admits to drinking in Boston prior to crash and fails field sobriety tests. During booking process, driver complains of pain and he is transported to hospital where he is diagnosed with several fractured rips and punctured lung. Hospital blood analysis is above .20 BAC. At trial, Prosecution cannot offer evidence of blood test results without expert witness. Records of injury otherwise admitted by defense for effect upon field sobriety tests. Not Guilty verdict following trial.