Rangers at Yellowstone National Park are investigating an incident that could have easily turned grisly.

Viral video from May 10 shows an unidentified woman approaching a mother grizzly bear and her two cubs at the parks Roaring Mountain. The video posted by witness Darcie Addington, who did not know the woman shows the woman holding up her phone, apparently taking photos of the bears.

The mother bear runs towards her, and the woman turns and quickly walks away. Voices in the background can be heard saying holy fuck and oh my god.