This is a concept that's been floating around in the heads of the KoRx dev team for awhile, and originated with akane, who is unfortunately no longer with our group. The purpose was to give the alien team a means of directly attacking humans with jetpacks. Akane's design concept looked like this:

but when she left the project was largely forgotten, even though Aaron5367 (our clan leader and coder) had already finished all of the backend work. So, since the completion of the xael update I've been working on it and came up with this:

and then learned some basic animation to produce 320 frames, which you can watch
here at half speed. This has been successfully exported to .md3.
A proper texture is in the works, and like I said, the code is already complete, so barring any unforeseen problems you all should be able to play with this very soon on the KoRx servers. Please drop by, and give us your thoughts.
More files related to the project can be found
here, and if you'd like a more complete version of the development process you can read
the project thread on our forums.