There are a few simple rules when visiting Yellowstone National Parks. One, is to stay on all marked trails and obey signage. The other is to stay away from wild animals. For example, a video has surfaced online, showing a man attempting to pet an adult bison on its head. Thankfully, no one was hurt. This "Touron" obviously can't read. (refer to rule #1). By the way, touron is a subset of the moron category.

nps.gov