By Silas Allen Staff Writer sallen@oklahoman.comA little before 10:30 a.m. Thursday, Skip Knowles stood peering into the muck at the bottom of Bricktown Canal, hoping to spot something he hadn't seen in two years. Knowles is the owner of Sure Beats Walking, a company that rents Segway scooters and offers Segway tours in downtown Oklahoma City.Read more on NewsOK.com