This is one of the funniest bugs I have ever found. Apparently if there is an alien evolving prettymuch anywhere near the ns_machina elevator and if you are standing on the elevator as marine (havent tested as alien) then the egg will be moved around as if it were on the same elevator even if it is not.

This bug works wheather you evolve up top near marine start or down below at the other end or even in the part of the middle in that little space down there. I have recorded a demo and will upload


The elevator in question is the one (near marine start), the one listed as green on the minimap, the one that goes up as well as around....

This is actually an issue with NS in general, and not specific to Machina at all. Bast has a couple of really great elevators to try this with as well

The only thing that is probably worth noting (at least internally for the Developers and QA) is that the elvator you are referring to is actually a different entity from the normal Elevators used.