To properly speed test it's Scan & Go app, Sam's Club brought in a man that personifies speed. Usain Bolt's challenge, if he chooses to accept it, is to scan 20 items in under three minutes and then skip the checkout line with the company's app. Only the bravest would take on a challenge so daring, but Bolt is ready to show the world what he can do. He takes off from the starting line and grabs everything from unicorns to frozen foods. Flying through product displays and narrowly dodging Sam's Club employees can't slow down Usain, but he'll make a special stop for a nice woman giving out samples. Getting back to his mission, he grabs the last few items, zooms across the finish line with seconds to spare and avoids the perilous checkout lines. Bolt is on top of the world, but there's a new competitor about to shake him to his core. Allyson Felix is in the house and judging by the multitude of medals around her neck, she did not come to play around.