Wonder what would happen if all the toilets were flushed simultaneously

Imagine if all 350 million toilets in the United States were flushed at the same time. Granted, doing this would require exceptional coordination, and the helping hands of a few million foreigners. But what if we could pull it off? Would flushing in concert explode all the pipelines, cripple the water supply, flood the streets with sewage, and, in short, destroy civilization as we know it . Could this be the 2012 doomsday LOL...The end of humanity By simple toilets