So I noticed I've been writing a lot about Black Ops lately and thought I'd even things out a little bit with an awesome mod for Minecraft.
The mod can be found here, and the concept of it is basically the same as in most LoZ-games; you shoot it at something and you get propelled to the object. While handy for getting where you want, you can also launch yourself extremely far up in the air, inevitably leading to your death. You can also use it against those pesky skeletons that are bugging you from range, launching you into melee range of them.
Be aware though, without good aiming skills, you're pretty much guaranteed to end up like Icarus.