Why do fat people stomp so hard in second story buildings?

It seems like they either don't realize how loud they're stomping, or they don't care. But literally every time I stay in a hotel/motel below an overweight family, they power stomp the ground all night. You would think that they would recognize that 250 lb stomps are going to shake the walls below them and wake people's kids up.
Why do fat people stomp so hard in second story buildings?
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