2011 BMW 750LI Tiressidewall Problems

drive speed approx. 5-10MPH slow down to almost stop intersection red light stop, over a very small bump. All sudden I hear a pop and all air is leak out and TPMS sensor goes crazy...Pull over and check, so there was a hole approx. 2-4 Inches on the sidewall tire unrepairable. This is an unsafe product on the road my opinion. Can't imaging if I was drive on freeway, could be a major fatality. Bridgestone Potenza S001 RFT 245/45R19XL 102Y BSW, suppose to be run flat. But not exactly I can't barely limping, luckily there was Allen Tires just block away, I was barely limp in, but my rim now womp. I think this products is unsafe on the road.