This took 5 DAYS to film, DAYS!!! He spent a whole day just trying to get the through the cones backwards bit right and it still wasn't perfect. If you watch all of the other films you see him hitting stuff - hard.
I saw him crash in Spain the other weekend, doing a "I'm Ken Block look at me driving" show mid way through the day, it was absolutely hilarious (as no-one was hurt.) He went to do a backwards entry round a cone and WAY over cooked it, he went backwards into a concrete block and landed firmly on the top. They had to use a forklift to get him down. For most other people that would be game over, but his team pulled out brand new suspension arms, struts, disks, callipers - the lot- and had him back out racing an hour or so later.