dudnt take much nowadays. thats why i agree with contrails and usmc...i would explain to the lady how incredibly inappropriate that was. i would explain to her briefly how much time and money you have invested in your job and that as a true professional even meant as a joke, her remarks are completely offensive. then, find the nearest available screening, whether it be a police officer with a breathalyzer or my company drug/alcohol officer. id make sure there was proof i was 0.00% just in case she would take her allegation further. thats a situation, given today's environment, i would want to take proactive steps rather than reactive steps.