Pick a ball before the 'race' starts and see if it wins. 

Don't cheat, choose before the race starts! 😂 https://t.co/vA7RqVzzBo https://video.twimg.com/ext_tw_video/1837263994454716416/pu/vid/avc1/720x1280/Bk4CtRnjt52EkcMc.mp4?tag=12