That is a combination of extreme arrogance, extreme stupidity and extreme disregard for you loved ones. I am sure most of us have the skills to do those cool step ups and step downs - but doing them there, and posting a video of it is "look at me" taken to a moronic level. "I am willing to die for a million likes and a viral video." I stopped watching halfway, because my stomach, mind and sensibilities couldn't stand it.
This is the part where internet junkies chime in "haters gonna hate..." But think of the psychology going on in those riders' minds. Why are they doing it?
Regardless, thanks for posting this Dana. Definitely made my adrenaline levels go up.