That was actually staged. They built the walls as a floating frame that could be moved around him. It wasn't until a decade later that we started seeing protot

That was actually staged. They built the walls as a floating frame that could be moved around him. It wasn't until a decade later that we started seeing prototypes for roomscale treadmills like these: https://youtu.be/dTAAsCNK7RA https://youtu.be/dTAAsCNK7RA