10Treble illusion

what is illusion? 
they are two types of illusions

1. An illusion is a distortion of the senses, which can reveal how the human brain normally organizes and interprets sensory stimulation. Though illusions distort our perception of reality, they are generally shared by most people 
2. type two is pretty must magic 

dynamo: 
David Blaine:
Houdini: Harry Houdini was a Hungarian-born American illusionist and stunt performer, noted for his sensational escape acts. He first attracted notice in vaudeville in the US and then as "Harry Handcuff Houdini" on a tour of Europe, where he challenged police forces to keep him locked up.