In a rush

The doctor was reviewing some results from a routine blood test with me during my checkup, then he took my blood pressure. "Were you in a hurry this morning?" he asked.

Contemplating the worst, I replied, "No, as a matter of fact, I sat quietly in the waiting room, reading and very relaxed. Why? Is my blood pressure off the scales?"

"No," replied the doctor, "you’re wearing your jacket inside out."