[adrian_b]

Also, when you experience an earthquake at the top of a tall building that oscillates and it sounds like it is going to fall apart, this is far more scarier than experiencing a stronger earthquake, but outside, on flat ground.

I have experienced big earthquakes in the former circumstances, and the sensation was confusing, until the earthquakes stopped you were not sure whether your building level is still firmly attached to its base, or it has started to travel independently towards an unavoidable fall.