As you rotate the doors handle there is a clicking noise and the unlocked door suddenly locks. A low rumbling is heard, and then a mechanical hiss. On the left wall the gear box begins moving down the track and along with it the celing slab.
In 7 posts it will reach the floor, closing the room forever.
There is noise and movement from stage 1, in 2 posts the spikes will have retracted back into the walls.
I use posts as a means of creating a time limit, in a game where posters come and go at all times. Just remember to use your "post time" well. And im also pretty lenient on what is and is not a contirbuting post, so you dont have to worry about someone post spamming and wasting your "time"