Giant explosion at Yellowstone sends tourists running for their lives

"The terrifying moment a giant explosion at Yellowstone National Park has been captured by
tourists as they ran for their lives.
Biscuit Basin, located just north of Old Faithful, erupted around 10am MST, sending a massive plume of superheated water and debris shooting into the sky. The National Park Service has closed all access to Biscuit Basin while geologists investigate the event." MS