How can a building fall as fast as it would through the air?

Question

How can a building fall as fast as it would through the air?

Answer 1

The building can be demolished by explosions, and using the core to determine the building center of gravity where the explosions start from there , and empty the core to allow the sides to fall inwards, hope this explains your concerns

Answer 2

Why, only if it was demolished with timed explosions set around the core frame. Some how i find this is a 9/11 reference, and how they fell at free fall speeds.

Answer 3

gravity!