Markus StÃ¶ckl finished out the last day of summer riding his mountain bike down a… mountain. Unsurprising I suppose, except for the following: Top speed of 130mph or 210 km/h. On Snow. This breaks an 8 year old world record. Several of the articles mentioned he was forced to hold his breath during the descent. Personally, I’d be much more worried about my bowels. Clench inducing movie is here.