Lightning Bolt

Here is a beautifully conceived illusion machined from a solid bar of brass. A large nut and bolt are shown to have a hole drilled right through the middle of each. Threading a cord through this hole effectively locks them together. However, when covered by a handkerchief, the bolt easily makes its escape leaving the nut still securely threaded on the cord. The nut, bolt and cord are all fully examinable. Easy to follow routine included.