READ THIS:
(c) Runway and terrain slopes illusion. An upsloping runway, upsloping terrain, or both, can create the illusion that the aircraft is at a higher altitude than it actually is. The pilot who does not recognize this illusion will fly a lower approach. A downsloping runway, downsloping approach terrain, or both, can have the opposite effect.
NOW, the above is from the USA FAA Aeronautical Information Manual. Illsusions of flight.
The captain felt high, it was an illusion. SEE ABOVE.
I knew this stuff before I had my private pilot checkride. Where are you flying?
Piano Keys? we call them threshold markings.