I get to the race at about 7:10 (8am start time), check in, get my timing chip, and set up in the transition area without my bike. I went and pulled my bike out of the car and my back tire is just about totally flat. I take off the valve cap and hear a POP sshhhhhhhh.... The tip of the stem came out. I screwed it back in, pumped it up, and it seemed to hold. Was that all it was? I hoped so and went and set up my bike.
Format was a Run, Bike, Run, Bike, Run race. The runs were 1.5 miles each, the bike sections were 8.25 miles each. There were 5 waves that started 3 minutes apart. The first two were for the Teams, the 3 remaining waves were for solo's. I was in the first solo wave, wave 3.