Disabling a gun

[rubybeetle]

I've heard this comment from many people, "Sure, you know martial arts, but it will do you no good if the other guy has a gun." If you're close enough (and quick enough), you stand a chance. I've only practiced one disabling technique, where you put your finger in front of the hammer to keep it from firing. If you're that close, it seems to me that it might be easier to get the gun out of the attackers hand. Any opinions? Does anyone know any other techniques?