When will people learn to not approach wild animals at zoos and national parks? The latter is even more dangerous since there's no enclosures at all to protect you - you just simply need to abide by the rules and keep a safe distance. Unfortunately some people don't think this applies to them - like this guy who decided approaching a freaking BISON was a good idea. Lucky for him, the Bison decided to give him a warning first. Some animals definitely wouldn't do that. Like I said, this guy is LUCKY.