US Car Tools - new tool to help drop your engine/trans out the bottom without a lift

Another interesting way to lift your vehicle.... It's some kind of airbag inflated by your exhaust...... When I saw the title it brought back memories of my teens when we lifted engines and trannies out with chains bolted to steel plates mounted to the rafters in the garage. Safe???? No not really but we were invincible kids with low funds and big imaginations.