That my friend is a combination of low profile tyres,a firmer than stock suspension? and a bloody sharp edged pot hole ..hit at speed..do not drive on it...the wonder is that you did not pinch the wall at the time..and deflate on the spot..
I speak as one who screwed 2x$160+ tyres on the front of my old Mazda in much the same circumstances..with less than 1000k's on them... ...the only difference was I was able after a protracted legal type letter writing exercise get reimbursed by the local council who had done a totally shitty job joining the road to the drive way I went over..It might be worth having a go at Dunlop via the dealer ..without telling the "full story"..