Stalling? Add power, drop the nose, add power, drop the nose.
How in hell could someone get a commercial pilot license and not be trained to the point of instinct to react properly to a stall condition?
Did you watch the video posted above? If it was a tail stall, the reaction has to be opposite of a normal wing stall. If it was a tail stall, pulling power and pulling the yoke is absolutely the right thing to do.
The horizontal stabilizer is a wing that produces downward lift. If it stalls, the downward lift to the rear of the aircraft goes away, leading to a nose-over, and the tail stall is worse with higher power.