This is why the Millenium bridge wobbled.
and he's a metrosexual.
(
Carlossus, Fri 2 May 2008, 16:20,
Reply)
That's what I was thinking
I believe the term is called sympathetic vibration (though may be wrong) and also why army troops are told to break step when they cross a bridge
(, Sun 4 May 2008, 18:06, Reply)