Well I just woke up, so interesting things to read through.
Let's see what I can remember from that fall..
Shortly after I started falling, I felt a collision with something else. Couldn't see it in the pitch black atmosphere of the hole, but it didn't seem to be too large. From what I could tell in my limited perception, it altered my trajectory slightly and I could feel myself moving horizontally for a bit during my fall (since the reflecting sounds of my yell seemed to be getting closer).
Fell for a bit after that, I hit a very solid something smack on, which I am going to assume is the side of one of the holes. It put me on course, and zeroed my horizontal movement. Ten there was a quick blur as I saw the main room, before falling back into limbo again.
It's hard to give you a time between when all this happened, since everything quickly meshed into a blur or events..