Keith Urban in concert is usually the picture of perfection, vocally and instumentally.  But when he kicked off his Get Closer Tour 2011 in Biloxi, Mississippi it was the "vertically" that was a problem.  Watch as Keith tries to get a member of the crowd to sing with him and he takes a spill.  Luckily, Keith is a true pro, and he just rolls with it, pops to his feet and keeps going!