I've heard this, I have a friend whose father was in the auto industry all his life, owned a body shop so they would constantly have a bunch of cars in various

I've heard this, I have a friend whose father was in the auto industry all his life, owned a body shop so they would constantly have a bunch of cars in various stages of disassembly in their shop. He was adamant about not leaving batteries on the concrete floor. There might be something to it.