Watch British Astronaut Tim Peake Perform Dizzying Somersaults in Space

NASA astronaut Tim Kopra help spin the curled-up Peake, who wanted to see how well his body had adjusted to microgravity after nearly six months aboard the ISS. "Something that happens when astronauts first come into space is that they usually feel pretty rough for about the first 24 hours," Peake said before starting the experiment. After a day or two in space, Peake said, the brain shuts down the vestibular system and relies just on visual information to get its bearings.