When you're summoned to do a flight early AM on your day off. As you drive past the the club at 0700, cussing your misfortune as you had planned for a trip to the park and a night in the lodge on the lake. You glance over at the club where festivities are in full swing and the Chief Pilots car is in the parking lot. The CP was the Captain of the flight you were "requested" to fill in for.