New tractor, new operator(?), new experience! That’s quite a slope to be mowing across!I got that picture off the internet and locals reported the operator was fine. They also make comments about the ROPS probably saved him.
Or soft spots due to standing water.The trouble with those type of scenarios is that all you need to have happen is to drop a tire off in a small hole/depression on the downhill side and the momentum will carry you over every time.