By James from the channel The Action Lab, trying to bring together a very large and powerful neodymium magnet with 1000 small neodymium magnets. As explained at the end, The power of these magnets is so great that if instead of small neodymium spheres using a piece of metal, It would have definitely suffered major injuries in his hand. This is because the balls beam is not homogeneous and many have their poles in random directions, neutralizing part of the magnetic attraction.