The martial art that uses the least amount of effort to cause the most amount of pain. It is one of the best forms of self defense as it is as effective from someone not as physically capable as someone who is in prime condition. It is the great leveler because your little sister could bring you to tears quicker than that bouncer that muscled you out of the club last week. The only art that is really worth a damn.
Don't mess with those guys... they know jiujitsu.