How did this truck not plummet into the Potomac River?

A UPS truck was unlucky enough to get caught on a Maryland bridge above the Potomac River Friday during a thunderstorm with 60-mph winds. The driver was lucky enough to avoid the water 135 feet below — by mere inches.

Authorities say the truck was kept from plunging off the Harry Nice Memorial Bridge in Charles County, Md., by "the grace of God." Neither the driver, the truck nor the bridge sustained major damage in the incident. It wasn't clear whether the truck was carrying any packages at the time, or if some ballast kept one fortunate UPS man from making a water delivery.

Hat tip to Stefan!