They just cant control themselves even in a public place like that. All around the world same behavior running up and hitting people from behind like its a joke even to elderly people.
Arny went down like a sad sack of streroid flab. What a girly man.
He was hardly moved by the animal, he still got it. There's a shot from another angle where you can see he maybe moved a foot or two, it just looks like form the most common angle that he went down, he took a step and kept standing.
Video below the link:
https://sandtonchronicle.co.za/226372/watch-man-kicks-arnold-schwarzenegger-back-arnold-classic-africa-sandton/