But swaywasn't the only problemconcerning residents, who also reportedhearing banging...

[narrator] But sway
wasn't the only problem
concerning residents, who also reported
hearing banging noises. That could be caused
by another air-induced
problem. The so-called stack effect. [Nehemiah Mabry]
When it's cold outside the warmer air
on the inside rises, creating a build up
of pressure that looks for
somewhere to escape which, in a super tall
building like this, could be the elevator shafts
or the garbage chute