How do those chefs chop and mince so fast?

see i think have some talent in the cooking area. i want to learn more, and i see those chefs on tv mincing and chopping w/their knives so fast . it's like in a second a tomato is diced into cubes. how do they do that? what should i practice so i can become like that too/ i know it takes practice and... show more see i think have some talent in the cooking area. i want to learn more, and i see those chefs on tv mincing and chopping w/their knives so fast . it's like in a second a tomato is diced into cubes.
how do they do that? what should i practice so i can become like that too/ i know it takes practice and practice, and im willing. how do you hold the knife, at what angle gives you the sharpest and cleanest cut? how do you train your hand to dice so fast, yet still not cut your finger/
please give advice, or at least give me a site that teaches you things like this.
thank you
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