i tipped a trailer once when I was loading off a closed dock and did not realize that the tractor had unhooked and drove away. luckily i was moving slowly and felt the trailer tip.
a while back I had to deliver a traveling head die cutting press to a shop that had a second floor overhead door and no other access. there was a very short dock under the overhead door. So I loaded the press onto a large fork lift and that combo on a tilt back. we drove it to the site then long story short, lifted the press up a good 12 feet to the second floor and was just able to get it inside the opening onto blocks so that it could be put in place with a pallet jack. all went well, but then it might not of! cripes, some of the things I did.