i tried that once, unintentionally, i got to the top of the first curve and slipped out, the box ate my thigh... it was hard to walk the next week and my thigh turned yellow.
no i didnt do all of it, i got to the top of the second curve. The whole week i didnt see anyone finish it. But i have seen candide do it, and talk to mammothpunks if you want a link to a vid, Cory Zila a local kid does the whole thing... It is the most challenging jib i have ever done, getting the right speed and balance is an art, thats why it is so fun.