This is a tool-assisted speedrun, made on an emulator, using frame-by-frame shooting, savestates, and rerecords to overcome reaction time and human error. As such, it is purely a form of entertainment, and is not designed to show skill.
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This run relies on an emulation glitch. Thus, it is not legitimate. The "official" run can be found at this adress: http://tasvideos.org/1564M.html