Inspired by the “wall of death” amusement park attraction, in which daredevils on motorbikes ride parallel to the ground along the inside wall of a giant cylinder, researchers at the University of Milan wondered whether they could devise a similar setup for space runners.

Researchers had two participants, one man and one woman, attempt to run inside a borrowed wall of death cylinder while harnessed to a counterbalance that mimicked the Moon’s gravity.

Motorcycles race at impossible angles on a carnival’s Wall of Death.

Danny Weil rides a motorcycle in a carnival motordrome known as the “Wall of Death,” which he says is only one of three left in the U.S.

Riding the wall of death, sometimes known as a well of death, isn’t easy.