Customer: "The Check-Engine Light and Service Engine Soon Light both came on. I smelled a burning smell, like something electrical. Then there was this grinding noise on the right side."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 !"