A charitable 240-mile trike ride, swim across the Straits of Mackinac, and a performance at the Grand Hotel. "Ride, Swim, Play, Give." Boogie-Woogie piano legend Mr. B (Mark Braun) , and a Joybox Express team of dozens launch the "Sprint 4 Flint" on Friday morning in a fundraising effort to benefit the Youthquest program in the city of Flint. WEMU will be following the progress all along the way!