User blog comment:Mrob27/Internal Data Format/@comment-4728735-20120106195426/@comment-4583259-20120116040424

Oh, yeah. There are two things there. Light blocks hovering above the test chamber, and dirt block that I added to mark where I had trapped a Brown_Mob. I later exploded the brown mob and ended up with an explosion hole below the test chamber:



Later I removed the dirt markers, build a permanent corridor into the explosion from the side, and fixed the floor back to all green. Here's what it looks like now: