I may be wrong, but I don’t think that is the world record… Zack himself said both he and Ryan Atkins have each done ‘around’ 42".
But here’s some other pics I found:
http://www.unicyclist.com/forums/showpost.php?p=405933&postcount=65
Take off:http://www.unicyclist.com/forums/showpost.php?p=310016&postcount=12
Here’s him landing 8:http://www.unicyclist.com/forums/showpost.php?p=310017&postcount=13