Originally Posted by
rydabent
It could have been just a bad seam in the tube.. After pumping up the tire a place where the tube might have stuck and then snapped loose could have caused your problem.
No, not true for an explosive flat. A seam letting go is extremely rare, except where the valve is glued onto the tube, and neither than nor any other problem that occurs entirely inside the confines of the tire/rim will cause a BANG! As already noted the tube
must escape first (either under the bead or through a significant hole or tear in the tire).