Coming up a blind bend in poor visibility on a bike that makes absolutely no noise and someone decides to do a u-turn from a parked position... I'm not suggesting that the noise of the bike is going to get you out of trouble every single time, nor is it an excuse to ride like an idiot. However you're clinging on to an engine attached to two wheels and I want all the presence I can get because I can only account for my driving and not the driving of others.