Originally Posted by
cyccommute
In the video, those guys are crashing on an inside corner because they don't have traction. They are riding the bike down because they don't have anywhere else to go. And what do you mean by "...you can't ride a bike down on ice"? Where are you going to go? Hover in mid-air? Jump to a higher plane? Take flight? Jaunte to safety?
Have you even ridden a bicycle to the ground? It only works because you get a bit of resistance from the dirt as you slid out thereby converting some of your vertical energy into the pushing out of dirt. Think about a berm. There is no such resistance on ice, the second you lean the body over you will just brutally slap right over on your shoulder and head. Not pretty, but thankfully the same lack of resistance means the bicycle can slid out right from under you so quickly that you're left standing mostly upright like a table set after the tablecloth has been rapidly pulled out from under it.