Vehicular Hypochondriac: Well, my check engine light came on today. I'm going to die.
Guy 2: Dude, it just came out of the shop! Nothing's wrong with it. You've just got vehicular hypochondria.
Mechanic: "I drove it around for 30 minutes and I didn't hear or smell anything. If you notice anything, bring it back and we'll deduct the price of today's service from the repair."
Customer: "I think my car's suffering from Vehicular Hypochondria! I swear it sounded like it was going to die! Now it's perfect. Go figure!"