Quote:
Originally Posted by JillyinMN
I heard that on the news this morning! They said it rocked skyscrapers in downtown Chicago!
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Rocking skyscrapers are okay (the welds should hold). As long as they don't reach building harmonics. Watch out being on the top floors you don't want get hit by flying furniture or get thrown out the windows (actually you and the furniture would be not moving much but the building would be).