Some people are pretty clever. I saw this at the track the other day, it seemed quite slick.
http://www.jackpointjackstands.com
The top portion goes on your floor jack pad, slide under your pinch point, jack the car up and slide the base around the jack, lower jack and repeat to lift the car. The guy using it, did one side at a time on a BMW. A bit pricey, but what is the price for peace of mind?
No, I don't have any. I use quick jack and ZL1 addons bolt on pads