November 29, 2011
A little over a week ago, David Ellis posted a video of him riding one in Austria in which he decided not to touch the breaks. It's been seen roughly 3 million times since.
Meanwhile, this 3 year old video -- also from Mieders, Austria -- suddenly spiked in popularity as well:
Not all popular videos are of the single-rail variety, of course. Earlier this year, thrillseekers may recall this POV video going viral; it was a first look at Japan's Takabisha, the world's new steepest roller coaster: