This is how Prof. Norman Badler wrote about DI-Guy:
    "One of the early human modeling project we worked on was a marksmanship trainer for the Navy. We converted our Jack model into a real-time system. We pre-scripted movements, combined them into a posture and motion transition graph, and drove the system from a server elsewhere via standard distributed interactive simulation packets called PDUs. Jack was pretty good at running, walking, crawling, shooting, standing, kneeling, and dying. But we had mostly engineering students in those days, and they weren't the best artists nor animators. Consequently our Navy sponsor sought a commercial contract to improve both the visual appearance and motion veracity of the interactive human model. The sponsor awarded this contract to Marc R.'s company Boston Dynamics, Inc. (BDI). BDI had seen the Jack version of the system and consequently built a better soldier model and gave it motion captured behaviors. The movements were naturally better, since they came from a soldier subject. The BDI system became known as DI-Guy and went on to dominate the human model component of the distributed interactive simulation world. We finished our relationship with the sponsor now that a commercial product served its needs"