 But Red Bull X-Fighters and the entire sport of FMX witnessed one of its first major tricks.At Las Ventas in Madrid, a new rider to the competition, the 18-year-old from Phoenix, Arizona, Nate Adams created freestyle world of motocross history after performing the first ever back flip at the event.The riders then returned to compete in the bullring of Madrid for the only X-Fighters event of 2004.