This week's Wave Challenge is barrel riding at the most perfect barrel ever created, by none other than 11-time World Champion Kelly Slater. This challenge is about staying inside the breaking curl of the wave for as long as possible and exiting cleanly. It will test balance, but also timing and stamina. The barrel section at The Ranch is very long -- far longer than almost any natural wave in the ocean. It's also fast, so competitors need to be comfortable staying low and balanced for a very long period of time. Legs will be aching if they make it right to the end of the barrel section, and the whole time they're inside, surfers will be making dozens of subtle adjustments to make sure they keep pace with the wave, and do not accidentally fly out of the barrel early, or stall for too long and get wiped out.