It looked very natural as it walked to a door, turned the doorknob, and pushed it open. It even climbed stairs, but it was incapable of reacting to changes in the environment. If somebody stepped in its way, it just kept plugging forward.
它會直線走向門前，轉開門把、推開門、爬樓梯，動作自然；但仍無法對環境做出隨機反應，如果有人擋住去路，強壯的它就會直接撞倒人。