Sounds like a snakebite. Check the tube for a pair of holes about a cm apart. It's probably not that the tire is bad, just underinflated and you hit something that squeezed the tire between the bump and the rim, and the tube, being the weakest part of the system, got pinched and holed. It happens on rocks, potholes, ridges in the road (as here).
__________________
"Don't take life so serious-it ain't nohow permanent."
"Everybody's gotta be somewhere." - Eccles