We recently learned that inverted aim was removed from the Splinter Cell Trilogy. That's most likely for the best, as its inclusion may have led to some rather unfortunate scenarios. Freddie Wong is perfectly aware of the potential hazards, thus he made the above public service announcement to illustrate the dangers of mixing normal and inverted aim styles.
Of course, something confuses me here. If Brandon was flying with inverted controls, that would mean that pulling back on the flight stick would have made the helicopter climb. Instead, Freddie tilted back and sent the copter into a nosedive. That means that it was Freddie who was playing inverted, not Brandon! Unless, that is, we act under the assumption that "normal" flight controls would operate identically to "inverted" FPS controls, in which case, normal would be inverted and inverted would be normal for the purpose of this video...
... My head hurts.