I don't know how that is on the humans, they were walking on the boardwalk when it charged.
That bison failed reading class. He didn't realize the boardwalk was like 'time out'.
The boardwalk was covered with people, so it's not like they were doing anything risky. What would you have done in that situation?
The boardwalk is not a safe zone. Wildlife doesn't know what a boardwalk is. Just because the boardwalk has other people on it does not make it safe or that those other folks have a brain.
If a critter is on the boardwalk ya go the other way.