A guy at work did that stair jumping thing successfully, but on a smaller scale. Half the size of a staircase in that gif, and it wasn't an escalator. He claimed he could go down a flight of stairs without touching any of the stairs. I wanted to see it, thinking he'd just slide down the handrail or walk out the door and take the elevator. He just jumped off (instead of diving off like that guy) and grabbed hold of the hand rail half way down and used it to kind of swing his legs forward. He landed on his feet then rubbed his knees and said that was a very stupid thing to do now that he has a little girl.
The key points were probably it being a smaller staircase and him not going head first.