A TPMS could have helped but I doubt it. I'm reasonably sure it was fully inflated when I pulled up to the light. I had to slowly roll forward as I approached the light and it was as smooth as silk. When I pulled away at the green, the tire had not made one rotation before I knew for sure it was flat. I would bet there was something in the roadway at the light and I got it, loosing air while I waited for the green.
There won't be any warranty reimbursement I'm sure. Driving on it for 150 yards to get out of one of the busiest intersections in Denton didn't do it any good. I'll see when I replace it if the tire guy can determine what it was.