I don't understand how on EARTH the car flipped.....
Hit the island unevenly at high speed and 2 wills would have lift off the ground and then over he goes.
If you ever have been Bush bashing through a mud track wide enough for 1 car at speeds around 80kph-110kph and hit a bit pot whole or a bit of a ledge on the side of the road you will understand how hitting something like that will lift 2 wheels off the ground and with out the right thinking and snap decision you can be up side down in no time