@Loki: Senjutsu is really just jutsu that utilizes natural energy, rather than chakra from inside of the body. It also relates to taking on the traits of a particular animal depending on whether or not you're an animal sage (like Jiraiya, who is a Toad Sage for example). Steam is fine with me as it is really just a combination of water and fire affinities. Though it's called Futton(Boil Release) it is essentially steam :P

Go ahead.