According to Joe (and Pork Pie, our resident aero guy) -- the shape of Joe's bike's body is so close to perfect -- that there's now significant upward "suction". Joe was being lifted out of his tuck and decided to shut it off before he got sucked off the bike.
He will be working on how to reduce the effect, I assure you. Maybe some velcro on his tummy?
By the way, Joe is quite excited about that run.
