spoilers
you line up in rows of 4x8 (think it was) people you then enter a 'fake lift' (that doesn't even move) that is supposed to take you down hundreds of feet but doesn't
you then enter a largish room with 4 rows of seats around the sides, you sit down then a lapbar comes down over all the row.
in the middle of the room is a giant alien egg (nemesis baby) that is being 'scanned' with badly themed lasers that don't even move or shine suddenly something goes wrong then lights go out and all the rows drop 26 foot, feels lot less, into a 'cavern' below with several more eggs, the lights go out 'again' your dripped with water, not sure whats it's supposed to represent ?!!?!? then you slowly rise (in darkness) to the above level, to see the egg as smashed and lots a of flashing lights and the staff shouting/running around telling you to get out asap.
laps bars rise and you make your way to another fake lift, this time on you way back up all those 100's of feet this time the lift shakes and seems like it's being attacked by the 'nemesis baby' that you NEVER see, there i said it.
you then exit the fake lift to yet move shouting staff telling you get a move on.................
all over in less than 5 minutes or so its seemed, if the queue is short give it whirl but never queue for more than 1hr, it's just not worth it