James Randi's Witty, Surprising TED Talk
"I have a very peculiar background, attitude, and approach to the real world, because I am a conjurer." So begins James Randi's 2007 TED Talk, a few minutes before he takes a lethal dose (32 caplets) of homeopathic sleeping pills. He then proceeds with a scathing takedown of psychic practices, explaining how cold reading works, and ultimately calling psychic practice a "cruel farce." Randi then proceeds to explain his One Million Dollar Paranormal Challenge, and briefly discusses homeopathy, including a very nerdy shout-out to Avogadro's limit.
This is hugely entertaining and interesting if you're into science. You may not agree with everything he says, but you will likely at least enjoy his style. Have a look below, or watch the high-resolution MP4 version.
There's lots more where this came from at Randi's website.