Misjudging the difficulty of a corner on a descent is something that fills many an amateur cyclist with fear, but imagine what it is like when travelling at the speed of a professional cyclist.
Dimension Data's Nathan Haas had to abandon Paris-Nice after such an incident on stage four, taking a corner a little too fast as he rode ahead of the peloton and ending up in a ditch.
The road with 30km to go was a little raised, meaning there was little to break Haas's fall as he plunged into the grassy ditch. Early reports suggest that he hasn't suffered any serious injury, but was pulled out of the race anyway.
As the camera bike followed the back of the peloton around the corner several seconds later we see Haas sitting in the field at the bottom of the drop, with support taking longer to reach him than he'd have liked thanks to the barbed wire between him and the road.
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