You have a history of heart problems, and been having crushing chest pain for the last week whenever you exert yourself, so you:
A. Go to the ER, like your cardiologist told you to.
B. Go to the ER, like your internist told you to.
C. Go to the ER, like your wife told you to.
D. Listen to some guy (who owns a furniture store) that you met at a cocktail party, who told you it's just a pinched nerve and you should go see a neurologist.
If you answered (D), it was a pleasure meeting you yesterday, sir. I'm sorry it was so brief, but if you hadn't run up the stairs to get to my office we likely wouldn't have had to call 911 as soon as you hit the lobby.