At first I thought it was rubbish, then silly, now addicted. Swines. My 2 year old loves watching it........that sums it up.
You just need a very looooooooooong line. Not really, I did it second attempt... It is all about the loop at the end and the angle of the entry from the downhill leg...
somemore of the line rider sires useing different vehicles: http://www.lineflyer.nl/index.php Look at the boxes in the top left and you can see all the different ones.