Even more CF described in the article below. The old guy did get a medical screening and the doc said the flight should be limited to 3 G's. But that information did not get passed to the pilot. Also, the ground crew did not help the old guy strap in. His harness and helmet straps were way loose, causing him to be thrown around the cockpit during maneuvers and causing the helmet to be blown off during the ejection. Also, the command eject system did go through the first step. The pilot's canopy was jettisoned when the passenger ejected, but the seat did not fire. This caused the pilot to wonder if his seat could cook off at any time.There is no indication the old guy freaked out. They went negative G and he wasn't ready for it and grabbed a handle to hold.
The whole incident was a CF. He wasn't properly screened medically for the flight. He wasn't given proper instruction before the flight. Even the ejection system failed to work properly, which turned out good, but the pilot should have been ejected as well. The system is designed so that either passenger or pilot can eject both in an emergency. Both are ejected in case one is too injured to pull the handle or is unconscious.