Being in a swing building is bad?!

Just read an interesting news:

部 分 人 面 對 十 號 颱 風 級 數 的 風 力 時 ， 在 微 量 擺 幅 的 室 內 逗 留 兩 、 三 個 小 時 ， 可 能 出 現 頭 暈 、 嘔 吐 甚 至 智 力 暫 時 下 降 等 問 題

Here is the translation:
For some people, staying in a swing building under the influence of a level 10 typhoon for 2 to 3 hours can feel dizzy, vomit or even temporary drop in IQ.

Wicked eh? Never really think that someone can actually feel the swinging of a building under typhoon b4. And getting a temporary drop in IQ? What's that about? How is that related?

Man, human body really works in a mysterious way...