Among the many differences between flying a small airplane and a big airliner, especially one with the Airbus's "fly by wire" control system, is that in some circumstances the right response in an Airbus can be to raise the nose. Please don't mention a Cessna. Regardless, if they had lost all their instruments, and with no visible horizon, even an exceptionally well trained and experienced professional pilot would have lost situational awareness and would not have been able to discern the pitch attitude of the aircraft.