BJ Not being able to talk to one another while they're onstage because they're mic'd.

Using sleight of hand techniques and charming storytelling, illusionist Marco Tempest brings a jaunty stick figure to life onstage at TEDGlobal.

And then, four years later, when I was 18 years old, I was standing onstage at the World Yo Yo Contest.

But as far as being a performer, I'm also diagnosed I reframe that as a positive because the crazier I get onstage, the more entertaining I become.

To find this out, I looked at three things I looked at the topic that you should choose, I looked at how you should deliver it and the visuals onstage.

I'm worried. When I first got the invitation, they said somewhere in the thing, they said, 15 minutes to change the world, your moment onstage. 15 minutes to change the world.

So with that, I'd like to invite onstage Evan Grant, who is one of last year's speakers, who's kindly agreed to help me to demonstrate what we've been able to develop.

Cash proposed onstage to June at a concert at the London Gardens in London, Ontario, Canada, on February 22, 1968 the couple married a week later (on March 1) in Franklin, Kentucky.

Anything that I would ask, she would turn around, dismiss, and I was basically up there any of you in the moderate to full entertainment world know what it is to die onstage.

Physiatrist and engineer Todd Kuiken is building a prosthetic arm that connects with the human nervous system improving motion, control and even feeling. Onstage, patient Amanda Kitts helps demonstrate this next gen robotic arm.

And it was very peculiar, because it was dark out, but she was back lit with florescent lighting, and she was very much onstage, and I couldn't figure out why she was doing it.

Onstage at TED2012, Jack Choi demonstrates a powerful tool for training medical students a stretcher sized multi touch screen of the human body that lets you explore, dissect and understand the body's parts and systems.

And I will now, here, onstage, try to predict when that will happen that Asia will regain its dominant position as the leading part of the world, as it used to be, over thousands of years.

Onstage at TEDGlobal, Péter Fankhauser demonstrates Rezero, a robot that balances on a ball. Designed and built by a group of engineering students, Rezero is the first ballbot made to move quickly and gracefully and even dance.

After Robert Lang's talk on origami at TED2008, Bruno Bowden stepped onstage with a challenge he would fold one of Lang's astonishingly complicated origami figures, blindfolded, in under 2 minutes. He's accompanied by the cellist Rufus Cappadocia.

Peter Tyack of Woods Hole talks about a hidden wonder of the sea underwater sound. Onstage at Mission Blue, he explains the amazing ways whales use sound and song to communicate across hundreds of miles of ocean.

What's it like to be pals with a genius? Onstage at TEDxCaltech, physicist Leonard Susskind spins a few stories about his friendship with the legendary Richard Feynman, discussing his unconventional approach to problems both serious and ... less so.

For a full year, A.J. Jacobs followed every piece of health advice he could from applying sunscreen by the shot glass to wearing a bicycle helmet while shopping. Onstage at TEDMED, he shares the surprising things he learned.

So I started to consider what I should do, and I thought, I wanted to make my performance better, and to show onstage how spectacular the yo yo could be to change the public's image of the yo yo.

Eve Ensler, creator of The Vagina Monologues, shares how a discussion about menopause with her friends led to talking about all sorts of sexual acts onstage, waging a global campaign to end violence toward women and finding her own happiness.

With scissors and paper, artist Béatrice Coron creates intricate worlds, cities and countries, heavens and hells. Striding onstage in a glorious cape cut from Tyvek, she describes her creative process and the way her stories develop from snips and slices.

Conductor Charles Hazlewood talks about the role of trust in musical leadership then shows how it works, as he conducts the Scottish Ensemble onstage. He also shares clips from two musical projects the opera U Carmen eKhayelitsha and the ParaOrchestra.

iPad storyteller Joe Sabia introduces us to Lothar Meggendorfer, who created a bold technology for storytelling the pop up book. Sabia shows how new technology has always helped us tell our own stories, from the walls of caves to his own onstage iPad.

Legendary skeptic James Randi takes a fatal dose of homeopathic sleeping pills onstage, kicking off a searing 18 minute indictment of irrational beliefs. He throws out a challenge to the world's psychics Prove what you do is real, and I'll give you a million dollars.

Cartoonist Jim Toomey created the comic strip Sherman's Lagoon, a wry look at underwater life starring Sherman the talking shark. As he sketches some of his favorite sea creatures live onstage, Toomey shares his love of the ocean and the stories it can tell.

His Holiness the Karmapa talks about how he was discovered to be the reincarnation of a revered figure in Tibetan Buddhism. In telling his story, he urges us to work on not just technology and design, but the technology and design of the heart. He is translated onstage by Tyler Dewar.

In the deep, dark ocean, many sea creatures make their own light for hunting, mating and self defense. Bioluminescence expert Edith Widder was one of the first to film this glimmering world. At TED2011, she brings some of her glowing friends onstage, and shows more astonishing footage of glowing undersea life.

Usman Riaz is a 21 year old whiz at the percussive guitar, a style he learned to play by watching his heroes on YouTube. The TED Fellow plays onstage at TEDGlobal 2012 followed by a jawdropping solo from the master of percussive guitar, Preston Reed. And watch these two guitarists take on a very spur of the moment improv.

But then the second group is even more interesting I am most drawn to my partner when I see him in the studio, when she is onstage, when he is in his element, when she's doing something she's passionate about, when I see him at a party and other people are really drawn to him, when I see her hold court.