CLEVELAND, OH - April 15, 2012 - When John Walker attended the Cavs vs. Houston Rockets game on Sunday, March 11th at Quicken Loans Arena, little did he know that his own shot clock was ticking. Following the game, he and his family headed to the Gateway East Garage where as soon as he got behind the steering wheel of his van, John went into full cardiac arrest. The next few minutes would be a test of time, skill and teamwork to save John’s life.