Pugachev’s Cobra is an aerobatic maneuver used to sell aircraft. It involves pitching the nose up in a maneuver that stalls the flight controls. Wikipedia says that in order to perform it, the aircraft needs thrust vectoring or a reaction control system and a thrust/weight ratio > 1.
A harrier can hover, so it must have a TWR > 1, and it has a reaction control system. Why can it not perform the maneuver?
Does the reaction control system not work when the engine is in the rearward facing position?