Ive done the same,once going over a 2' log,hopped it staright up torward the sky and landed on the grab bar then rolled on me.
then once going up about a 5' hill,but it was super steep,went up,and the tires just spun,so i let it roll backwards and then pinned it up the hill again,flipped straight on top of me,no broken bones,so i kept riding.