A mother black bear and three cubs crossed a tourist-lined bridge in Yellowstone National Park last weekend, ABC News reported Saturday. No one was attacked or injured.
Watch as the bears chase a family who scramble to get back to their vehicle.
*This story has been revised from the version first published on May 11, 2015, because it inadvertently used similar language to what was published on ABCNews.com. Outside apologizes for the error and is investigating all previous work of the writer.