Constant prop force and extending hallways

[Nuclearbones]

I'm working on a claustrophobic hallway map. I plan on this to be the scariest part of the mod.
To achieve this I will need swaying ceiling lanterns and an extending hallway.

For the swaying lanterns I know that I need to use Prop Forces and stuff like that. But how do I make the lanterns constantly swinging?

Also, I need help with the hallways looking like the exit is moving away from me and the hall looks like its getting smaller.

I have a couple other effects I'm going to be doing but I don't want to spoil them! What other freaky delusions can you guys come up with? I want this thread to be FILLED with ideas!

Thanks!

And Happy New Year!