I actually did that once. I wan't unloading a new fridge, but was unloading the old one at the recycling place. It's a controlled fall, which if the fridge is a newer model, isn't too hard to manage.

The second fridge I tried to unload, I misjudged the tailgate end and it slipped.

I did have the presence of mind to get out of the way rather than try to catch it. Good thing the fridge was junk... it was even more junky after the drop...