Hehe.
I've been in some pretty tight crawl spaces in my time.
One thing that stands out is how plumbers always have the annoying habit of running their pipes (PVC) right past the man-hole, so getting under the floor or getting out is pretty much impossible, without sucking your chest way in.
I remember being under the floor of a house some years back and let my eyes accustom to the darkness, I shone my flashlight around to have a look around (as you do), in one corner, I saw about 16 or so pairs of small eyes looking back at me, I have never bent myself so quickly since.
One other time, I was under a floor installing a cable for a Night-Store heater, I happened to turn around and there were some green eyes looking back at me from the other end of the torch beam, the owners cat had got under the floor
and Good Lord, have you ever tried to catch a cat under a floor without knocking yourself stupid?
