Usually, whilst playing Trials HD, you'll either be watching your bike and the upcoming terrain or you'll be minding your language and trying as hard as you can not to crumple your controller up like a Styrofoam cup. Most people, I'm willing to bet 99% of those who have played the game since it's release a few years ago, will have noticed more than a couple (if any) of the strange symbols dotted around certain levels. More importantly, they wouldn't have worked out that each of these symbols were connected in an elaborate mystery that has, until Red Lynx revealed this video, remained a mystery.
At twelve minutes long, this is more than a few cameos and far more in-depth than perhaps was expected from a motorbike stunt game, but it's interesting nonetheless. If nothing else, it makes you think about how many other little gaming mysteries are out there that are yet to be found.