Quote Originally Posted by mickchick
Never underestimate the power of a scream. I've used it more than once to save myself from being hit. It might be worth getting that super loud horn that someone mentioned in another thread not too long ago!
Personally, the last thing I want to do if I have to get myself out of a dangerous situation in a hurry is have to take my hands off the handlebars to grab some other device (ex: horn).

My lungs and vocal cords are directly accessible and quite useful (plus, we don't get that many occasions to use them like that so it's somewhat empowering... if it works!!!).