You would have to use something without a cling factor, like butcher paper. Meat is extremely sticky. If you put dry butcher paper between the meat and the magnet, my guess is there would be no stickyness and the magnet would slide off. Probably the same with most of the 'magnet challenge' videos. Paper would not block magnetic attraction but would negate the stickiness factor.
When I was a teenager we would skip classes at high school and head over to my buddy Scott's house which was near the school. We would smoke herb and get the munchies and Scott's parents always had loads of mac and cheese. Scott's method of telling if the noodles were done was to take a noodle and throw it at the ceiling. If it stuck, the noodles were ready. There were dried noodles all over the ceiling above the stove. I guess his Mom was not much of a housekeeper.