Footage of a cross-county skiing event, where dozens of skiers collide in chain reaction, has gone viral

The Tartu Maraton, which took place in Lipuväljak, Estonia has been a traditon for over 50 years.

The man behind the camera, Aivo Jurken, calls it "the biggest sporting event in Estonia"and says "every Estonian wants to race on this competition once in her lifetime."

The fun begins around the 7:00 mark.