I made one of them once, but the furthest i got was having the seperate parts powder coated then i just gave up and made some brass screws for summat i needed at home.
Drinking on my own like the true alcoholic that i am, might go watch some tv with the boys, might even go put my new file dividers in their rightful places!
Find a wall that has a linear increase in height. Start small and work your way up. Then you can think to yourself "its only a couple of inches higher than the one i just did" then before you know it you're a pro at dropping and riding for Koxx bikes or team Nick Wood.
What lens are you using (bear in mind i have no idea about photography!)? Only in that picture, i've made the gap from lowest step to the low circular wall on the right. And it looks like 20 foot in that pic!
Yeh the top 100 riders thing is interesting... 'Cos there could be an awesome rider who not many people know who would do really well but wouldn't be invited? Guess thats the nature of the beast.