By now you've no doubt seen "Gymkhana Seven: Wild in the Streets of LA." If you haven't, or if you just want to see it again, watch it above. We'll wait. Now that you've done that, you're impressed, as always, with Ken Block's driving, you want that insane 845 hp, AWD '65 Mustang, and you might be contemplating just how difficult it must have been to capture some of those shots so perfectly. 

We were wondering the same thing, and that's why we asked Ken Block. He told us what were The 5 Biggest Production Challenges In Making Gymkhana 7.