Nice commute today, bright & sunny on the way home: I had repaired the tube that went flat earlier this week & reinstalled it on the Centurion. About 3 hours after arrival, the tube detonated with a loud report. Scared the be$%#@! out of my co-workers since I park my bike against the wall outside my cubicle. Sounded just like a gunshot. We were cautiously exploring our end of the building for the source but found nothing, I noticed the rear tire was flat & fessed up to everybody. One more chapter in the book of life. Don