Last summer I stepped out into my yard and noticed, about six feet away, a little mouse that had popped his head up out of the grass and was looking at me. However, at the same time, a cat, which had been sitting motionless on the picnic table about 20 feet away, saw the mouse and launched itself towards it.
The cat was lightning fast and the mouse had no chance to run for cover, so it turned and faced the cat, and as the cat loomed over it, the mouse launched itself at the cat's face with its teeth and claws out.
The cat made a small adjustment in its motion and bit the mouse's head cleanly off.
That mouse was the bravest creature I have ever seen.