Getting rained on and it's cold, and they tell you to descend from the summit together as if you waited until people's sweat dried... Then with your body shivering from the cold, and when you get hit by the cold downhill wind...
When people gather and descend on the rainy road, it's even hard to time the braking, and with sudden braking there's slipping and it would be even more dangerous... Even with SevenBridge, the marshal parade got very long and crashes occurred very frequently...