The Amazing Randi rope trick

James Randi (born Randall James Hamilton Zwinge; August 7, 1928) is a Canadian American stage magician and scientific skeptic best known as a challenger of paranormal claims and pseudoscience. Randi is the founder of the James Randi Educational Foundation (JREF). Randi began his career as a magician, as The Amazing Randi, but when he retired at age 60, he switched to investigating paranormal, occult, and supernatural claims, which he collectively calls "woo-woo."

Although often referred to as a "debunker", Randi rejects that title owing to its perceived bias, instead describing himself as an "investigator". He has written about the paranormal, skepticism, and the history of magic. He was a frequent guest on The Tonight Show Starring Johnny Carson and is occasionally featured on the television program Penn & Teller: Bullshit!.

The JREF sponsors The One Million Dollar Paranormal Challenge offering a prize of US $1,000,000 to anyone who can demonstrate evidence of any paranormal, supernatural or occult power or event, under test conditions agreed to by both parties.

Link: Wikipedia