Lucky one there mate, the tyres look in good condition to. I had a blow out a few years ago having a bit sport in my old Saph with a bike, front drivers side blew a split in the inside about 8 inches long, the noise was mad, the poor lad on the bike who was level with me at the time got a shock to, really loud bang! car never budged much at all, the tyres i used at the time were Avons and i know from getting them fitted before and having a propper nightmare to get them on the rims they were a really hard tyre, so i dont know if that helped but i thought at (them) speeds it would have span and been on its bloody roof. i always kind of think of that now.