on this day , on his way out the front door , with the front door swinging in , striking the out swinging bathroom door that hed left open , he said what he always says and walked out to a busy sidewalk full of peoplebut only a-block-and-a-half later realizing that he hadnt been breathing since breakfast when he thought it would be fun to see how long he could hold his breath , timing himself during the first ten seconds then forgetting and doing everything he normally did .