I have seen small robots transformed but Takeshi Maeda’s OmniZero.9 is not a small robot. It is more than half a human height and has wheels on the shoulders and knees. It can transform to allow the wheels to move it up a slope (if you are expecting Transformer type of transform, you will be very disappointed). And the best part is that the top (head) can be flipped backwards to allow a guy to seat on it. It seems to be very stable with the added weight.
Here is the video.
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