I guess it is the Tsuchikage's Jinton Genkai Hakuri no Jutsu. If that thing its you, you're gone, completely atomized. Only someone really fast or with a space time technique can escape that.
Kakashi's Kamui takes some time to focus and warp things to the other dimension. Its a great technique but slower than the Tsuchikage's technique.
but the Jinton Genkai Hakuri no Jutsu, has to be used in a enclosed place, e.g. if you get in to fight in the middle of a feild or just simply out side, Jinton Genkai Hakuri no Jutsu is simply useless as you can run away and the acidic vapour should Disperse in to the atmosphere.
Everybody keeps sayin kakashi's MS Tech takes alot of chakra, wich it does but he managed to teleport deidrias arm which if a fairly big object, so all he has to do is focus on some ones head make a pin size hole in their brain, and there you go fight over, that should take no were near as much chakra as a whole arm, and don?t forget kakashi used his Kamui more then once that day. I think kakashis kamui is one the most deadliest Justus ever.