I know you humans arent as perceptive as us capybaras, but if you watch the video carefully, you'll see that "guy" was running along-side the horse for a bit before he slid and fell under it. You know, falling? That thing you bi-pedals do when trying to do something as simple as move forward? Seriously though, why did you guys choose to evolve like that? Even kangaroos have a tail to balance with, what do you have? Thumbs? Yeah, hope you enjoy your thumbs while every other animal gets to live knowing they didn't ruin this planet and fill it's orbit with scrap. You guys should just do the same as the last hyper-intelligent biengs ruling this planet did 3.6 billion years ago and become crustations.