We were just at a bank demo where they had a large breaker. This machine was big enough that it picked up the 15x15x8 foot vault, about 18 inches thick, half brick half concrete, and dropped it in the basement. We needed him to punch some holes around the vault doors so that we could pull them. One of the vaults had an old ventilator that was 1/2" stainless steel, and would pop outwards to allow air into the vault.
He put the breaker against that round 1/2" plate, pushed the machine against it, and hit the hammer. It pushed it clear through the concrete, and barely even scratched it up. Something like this works great on materials that will fracture (like concrete), but not on something that is flexible (like steel). Again, seems pretty impressive until you look at it really close.
Let me give you another example. What about those companies that drop their safes on the ground from way up in the air? This also seems impressive at first glance. But you have to look at the mass of the safe (or lack thereof) before deciding how impressive it really is. Have you ever seen an empty soda can collapse when dropped on the ground? Based on their own example, their gun safes are equally as strong as that soda can, which really is pretty truthful when viewed in that context.