The reason that it's free is that the owner doesnt want to pay to have it removed. I dont know what it's job was but that cab is caved in and you know the brakes are going to be stuck. You'll need a bulldozer and a chainsaw to pull it out of there and there still isnt anything to save. It's tempting to accept a free truck but unless the owner is paying you to remove it...

Gravity - It's not just a good idea, it's the law.