Actually, might have been yours. I awoke in a room that said Xentity and I had to pull a lever to escape.
No that was mine, not idea how you got in there though! You must have spawned in my last spot!
Nexus' is much larger... if you head out the front off mine and follow the sky rail to the right, Nexus' is on the left and you can't miss it if you have the draw distance to far!