Geyser "Erupts" at Yellowstone; Boardwalk Destroyed, Citizens run for lives

Video below shows something which has **never** happened before:  A Geyser at Yellowstone National Park "Erupted" today, spewing ash, rock, smoke, steam, and dirt, in such quantities that nearby park visitors ran for their lives. 

The park Boardwalk, on which hundreds of thousands have safely watched the geysers over many years, was completely destroyed.

Park Rangers have closed off the area.

No reports of any injuries.

Here's video: