The Phantom was very sensative in pitch. It took a while for any pilot to get used to. It became obvious during AAR and at low level. In the USAF we did a low level accel and slow down to demonstrate the effects of pitchup and pitch down. 200kts to 600kts in full Afterburner and then idle/idle A/B and slow down. If a stude started to PIO you would only get 2 reversals to take control of you would be another hole in the desert floor.