HZ39, when their high pitch reduced to 5 degrees after their 7,000 fpm climb bringing it down to 5 degrees doesn't that seem like what would happen after their zoom energy had been used up? At that point they were in a deep stall and about to fall like a rock. Too bad the captain wasn't there to help them out when they lost their airspeed indications. By the time he got there he must have been as confused as the copilots.