Tbh, all jokes aside, I do actually think that the building statement must be in reference to special cultivation buildings.
More importantly, since physics definitely work differently in this world, and buildings and matter seem to be somehow reinforced, I don’t think it can be compared to our world.
For example, in the last update, if you pass a 90 strength check to make Ruo stumble by stomping on the ground, it states that the whole mansion shakes from the stomp.
Now that would be impossible in the real world because of how surface area and force application works, but that’s not my point.
My point is that even if it were physically possible to produce enough force with your foot to shake a whole mansion and not fly upwards because of the opposing force, the stomp should by all logic just go through the ground with that amount of energy.
So considering that, the rock has to be somehow reinforced to handle that kind of force and distribute it through the whole foundation and make it shake.
Again, applying real world physics to PoMA is already dubious, but if we are to grasp at straws, then this could be viewed as one such case.
But bruh, if the MC with 90str can stomp and shake a whole mansion and produce and earthquake, then I have no clue how YB can only collapse a building with his strongest punch.
I guess it could be a very large building lol?