Mat glad you are OK,things happen so quickly.I use four jack stands now that I have learned my lesson,and never never leave the weight of the car on the jack. Two jacks are not safe because of the angle of the car,a hydraulic jack with no car weight on it is an added safety device.

When I was building the coupe I needed to get the car higher than the jack would travel to get the maximum on the jack stands.I put a 2x12 piece of wood vertical on the hydraulic jack.As I was jacking that was causing the jack to move and the 2x12 kicked out .The jack was under the front and I mulated the front fender and grill shell A stupid costly mistake.

Think it through we only go thru here once.Wish I had a good lift as I really have it tough getting up and down.It's called getting old.