1, didn't know the police phone # offhand so I called 911 to contact the police about an obviously very, very drunk driver.
Once on the line with them, the state police asked me to follow the person, who ranged anywhere from 5-40 mph on a 45 mph limit road and who was only rarely in her lane, preferring the curb or the opposite lane. Luckily the few people who were going the other way were doing so at a sensible speed and able to easily slow down in time and give her a wide berth. About 10 minutes later the police showed up and arrested her, thank god.