How is the egg not just another "mistake in continuity"? The film just says it is there, and we're supposed to accept it.
The same people who snuck in to change the tubes put it there, how about that?
Another WY conspiracy, those wiley devils.
Jeez, I mean come on...
"Okay, so the Queen had an egg and a facehugger maybe, and possibly the facehugger moved the egg into another room, and then the egg might have climbed up under a table perhaps, with the tendrils that have never shown any sign of being prehensile, and then something else implausible might have also happened."
I think I might just slit my wrists with Occam's Razor.