permitguy
Gold Member
Interesting:
http://news.blogs.cnn.com/2011/07/19/scientist-tae-bo-workout-sent-skyscraper-shaking/?hpt=hp_t2
I've never heard of such a thing, with the exception of marching in unison on a suspension bridge.
http://news.blogs.cnn.com/2011/07/19/scientist-tae-bo-workout-sent-skyscraper-shaking/?hpt=hp_t2
I've never heard of such a thing, with the exception of marching in unison on a suspension bridge.