You can't say that it was for lack of effort.  Dan Coller gives all he's got on three separate sessions, at two different rails, in an attempt to ride away from a good sized X-up rail.  

"The struggle is real out there in the streets! Dan Coller spent the first few days of the Kink House project trying to get some X-up Grinds under his belt...and unfortunately things didn't go as well as planned. Follow Dan around San Diego for a few days as he pushes himself until he can't do it anymore...." - Kink