Mexican traveler Juan Carlos Cheang Guzman was riding the pump track at Chongli Fulong Mountain Bike Park in Zhangjiakou, Hebei Province, when he failed to clear a roller. The bike tilted, and he went down hard. He picked himself up, dusted off, and swung back into the saddle – low center of gravity, then a burst of speed. On the undulating track, his bike flowed with the terrain, carving smoothly through every berm and roller in one fluid motion. From fall to flow – that's the beauty of mountain biking: you go down, you get up, and you ride on.