Not long haul, but many too sectors in one day. I woke up once and mistakenly thought I was flying a cadet on an air experience flight. As I often did on those flights, I switched on the intercom and said "If you just tighten up your seat harness now, I'll begin my aerobatics sequence with a slow roll, followed by a loop".
The loud screaming from the passengers, who were halfway through their picnic lunch, reminded me I was flying the helicopter today.