I forgot the right name for it, but at my old dojo we had drills where you had to stand there until someone swung a sword at your head and then once they swung you'd move real real fast to get out of the way. Usually then you'd disarm them and often you'd show that you could kill them with it. Ancient Japan could be a very violent place apparently. Anyways, clearly I have *nothing* on Jewelchild's "mad observational skills!"
If anyone ever wants to learn observational and reaction skills I *assure* you that nothing says "I'd better pay attention and move away NOW" quite like seeing someone's fist flying at your face!
I have been known to grab a spare lamp from another room and set it by the dead bulb instead of just changing the bulb though.