I'll admit that I'm not too familiar with James Randi's magic tricks, but I have extremely high admiration for him because for decades, he's debunked hundreds of tricksters pretending to have psychic powers using totally logical means. From mind-readers to wackos believing in Nostradamus's writings, Randi has conquered all of his opponents.
Even better, Randi puts his money where his mouth is and has $1 million set aside solely for someone who can prove that they have psychic powers under controlled tests that take cheating out of the equation (it was originally $10,000). This fund has been around since the mid 60's (if I'm correct), yet no one has been able to claim the money. Strange, isn't it?
Here's one of Randi's best moments, where he exposes James Hydrick as a fraud in the early 80's.