What do you get when you combine the ferocious kicks of taekwondo, the grace of wushu, the improvised movements of capoeira, and gymnastics? The head-spinning martial art of tricking. The practice, which developed during the 1990s and early 2000s, requires agility, precision and impressive lung capacity. Korean tricker Ingun Yoo, aka “Kick Gun,” is one of the best around. Just try not to get dizzy watching him whirl.