Seventeen people performing a vigorous Tae Bo workout caused tremors that forced the evacuation of a South Korean skyscraper earlier this month, the building's owners say. Scientists recreated the event in the 12th floor gym, according to a report in the Korea Times.
I don't know which is scarier, that they made such a flimsy skyscraper, or the sight of 17 scientists doing a Tae Bo workout. Hopefully they're better at it than the scientists I've seen in the gym (note that IAAS).
"This is lemma 1.1. We start a new chapter so the numbers all go back to one." -- Prof. Seager, C&O 351