Just imagine... you're in the ride, not expecting too much, you've probably riden it 50 times but this one time... There he was, the real Johnny Depp dressed in costume and appearing only for a short amount of time. In character. Interacting with the people in the ride.
If I was in the boat I'd just become speechless and watch him and by the time our boat was too far away I'd remember I had a camera!
I wonder... would people panic? Or just appreciate the Disneyland surprise.