Things you can learn on an ER rotation.
Stay away from people named "Some Guy" or "This One Dude", because they for whatever reason, just punch someone in the face or hit them with a crowbar and run off. If I see them on the street, I cross the street to get away from them.
never leave your last refill of percocet in plain site after your docs office closes if one of these 3 friends is coming over for dinner:1. some dude
2. my friend
3. that bitch