Then an angry bison — tail raised — shows up behind the bear as it flees at breakneck speed. It isn’t just any bison — it’s an angry mother, Welden explained.

Video shows the “upset” bison charging and chasing the family in Yellowstone National Park. Screengrab of video posted on @tw44x2's Instagram A frustrated bison charged and chased a family in ...

Then an angry bison — tail raised — shows up behind the bear as it flees at breakneck speed. It isn’t just any bison — it’s an angry mother, Welden explained.

Then an angry bison — tail raised — shows up behind the bear as it flees at breakneck speed. It isn’t just any bison — it’s an angry mother, Welden explained.

Video shows the “upset” bison charging and chasing the family in Yellowstone National Park. Screengrab of video posted on @tw44x2's Instagram A frustrated bison charged and chased a family in ...

Then an angry bison — tail raised — shows up behind the bear as it flees at breakneck speed. It isn’t just any bison — it’s an angry mother, Welden explained.

Then an angry bison — tail raised — shows up behind the bear as it flees at breakneck speed. It isn’t just any bison — it’s an angry mother, Welden explained.

Then an angry bison — tail raised — shows up behind the bear as it flees at breakneck speed. It isn’t just any bison — it’s an angry mother, Welden explained.

Then an angry bison — tail raised — shows up behind the bear as it flees at breakneck speed. It isn’t just any bison — it’s an angry mother, Welden explained.

Then an angry bison — tail raised — shows up behind the bear as it flees at breakneck speed. It isn’t just any bison — it’s an angry mother, Welden explained.