Flying a negative Humpty in a Super Decathlon somehow the g-force pulled the throttle back during the push-over. All I realized at that point was the change in engine sound, so I brought it back to straight & level and noticed the manifold being 10inHg too low. I mentally prepared for crashing into the next best paddock until I finally reached the T in FCMIT and brought the throttle back to were it was before...