Going Going...

superss!! That's the kind of stuff that keeps kids out of houses, shame on u!!

SuperSS is right - I feel like I'm on LV-426 looking through a helmet-cam!

... there was a spit there. It looks deep, throw the drywall, but just photo illusion.

I was looking at this wrong. The high contrast/mapping made it seem like...

Xenomorph acidic blood.

I'd say the roof is the single most decisive factor in the decay or persistence of a place

Must be a hole in the roof above it..

This seems unusual. Not metal scrappers. Not house settling. Just decay?