sferrin said:So many smart ass remarks come to mind. . .
Michel Van said:Just a artistic interpretation of a MMU unit could look like...
Not exactly. The USAF Museum in Dayton has one of these on display (the Marquardt space sled). It was a real effort that produced actual hardware (that did not fly in space). As memory serves, it was a Gemini-era program to provide an alternative to the MMU developed for Gemini, something with more capacity and presumably easier to pilot.