Look carefully at the snow skier as she approaches a gate during a giant slalom race. The ski on her left leg is in mid-air. There likely was considerable pressure on the binding as she entered the turn and it broke loose from the boot. The next few frames captured the rest of the fall but this photo shows the actual cause of the crash. The fall itself wasn't very exciting but this one photograph shows the impending doom and is the most exciting one of the series.
400mm lens, 1/2500 second at f/3.5, ISO 100.