Yesterday, my parents, son and I stopped off at McDonald's for an early lunch before heading to a charity event in Rockville.  As we were sitting down to eat, we suddenly heard someone yelling at a cashier to give him something and calling her names.  I looked up to see a very large man leaning over a nervous-looking girl in a McDonald's uniform, with several other cashiers milling about.  Suddenly, the man collapsed.  A customer yelled out that the man was having a diabetic attack.  I jumped up and ran forward to see if I could help, but someone already was giving the man a cup of orange juice and someone else was on the phone, presumably calling for an ambulance.

The man wasn't shouting at the cashier because he was drunk, on drugs, or simply being a jerk; he was desperately trying to tell the cashier to get him something to eat or drink right away to restore his blood sugar level.  Fortunately for him, someone figured out what was going on and got him some juice very quickly.  I can see how someone else might have interpreted him as being drunk or on drugs and called the police instead, though.