I hope it wasn't the "Grace L. Ferguson Storm Door and Megamagnet Company."
A friend of mine once ordered some incredibly powerful magnets to use in an industrial machine. The magnets are so powerful that they're shipped in wooded boxes substantially larger than the magnets to prevent anything magnetic from getting to close to the magnets while in transit. Well, the receiving people removed the magnet from the wooden packing, whereupon it rocketed toward the steel loading dock ramp and shattered on contact (they're made of very brittle material). The shards were stuck to the ramp so hard, the people couldn't get them off.
Most on that thread thought that was a possibility.