Hey! It could happen to anyone...

From News of the Weird.com:

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Raleigh, N.C.:  The governor vetoed a pro-fracking bill, but pro-frackers worked to override it.  However, governor's allies, led by Rep. Becky Carney, had the veto beat, by one vote--except that when it came time to actually vote, Carney pushed the wrong button, and the veto won.  Carney:  "Oh my gosh."

To see full story-ABC News (tip: The Atlantic)