People do try to drive mobility scooters on highways, even though they’re small, unlit, not very visible, and not even street legal. Usually, those scooters are their own, and don’t belong to the local mega-mart.
Where did he get the scooter? He “found it.” He did not specify to police where he found it, so we’re going to guess “in the front entrance of Walmart.”
Police: Drunken driving suspect stopped on Walmart scooter [Indianapolis Star] (Thanks, Charles!)