Say you're in a cave or something. Typing /top will raise you to the top of the highest block above you, therefore bringing to the top. /jump moves you to where your mouse is pointed.
OoOo, does that mean we can //replace dirt TNT now, too? and I thought jump was an essentials command? (Regardless, I'm against it.
I don't think jump is world edit. But top is. And yeah I agree, //replace dirt TNT = happy server. But no seriously, I don't like it.