In the wee hours of the morning earlier this week, Mainz, Germany, was covered in a strange fog unlike anything residents had ever seen before. That day started out as a sunny one, so the bizarre haze seemed out of place.
That was when city officials came racing to the scene and told people to remain in their homes. Something dangerous was afoot.
While the truck was on its way to a wine-bottling facility, the driver suddenly learned that the valve on the truck was broken. Gas was pouring out of the vehicle.