I believe that George is the resident ghost that inhabits the PoTC attraction. Legend has it that if the CM's say good morning to George first thing in the morning that the ride runs with little to no problems all day. However, if anyone, forgets or is just a non-believer, the ride becomes a nightmare of breakdowns and problems all day long.
Apparently, they have been staffing the ride with non-believers almost completely lately. So if you had a good ride and nothing bad happened, then say thank you to George on the way out. He apparently enjoys positive feedback.