Go to your nearest techno club. Look for the guy with glowsticks, making green circles in the dark so fast it looks like a ball. That dude's got Chi.
Just kidding. I do believe there is such a thing as chi, which is basically focused energy, but I don't believe in it as you'd see in the old kung fu movies or on street fighter (HIRUKEN!). I believe it's more of an inner peace/focus & concentration sort of thing. Like Americanfighter said.