Unless it turned on the stack I doubt anything would happen. I think they were in this basic condition when they arrived, then just started falling apart. I'm working with a lift right now. I bet I could put money under it and roll right over it. sand is on site too....depending on the width of the tires it will spread the weight around a larger area....if it did turn on the stack, I'm guessing again that it would have to be wet to allow the bills to shift. it they are stuck together, they would probably move together?