“At first, the sensation I got was that there was a pop, then there was a big explosion and a clang. We were thrown forward in the seats. We had our shoulder harnesses fastened. Fire and sparks started coming out of the back end of that rascal. The light was something fierce, and the acceleration was pretty good. The vehicle yawed off – I don’t remember whether it was to the right or to the left – but it was the kind of response that the Lockheed people had predicted we would get. . . . The shutdown on the was just unbelievable. It was a quick jolt . . . and the tailoff . . . I never saw anything like that before, sparks and fire and smoke and lights.”  John Young Gemini X.