I'm going to call this a bug, but I guess it could be construed more as a feature request. There are a number of special messages that do not appear to do anything at all, and it would seem to make sense that they ought to. I'm not sure if this qualifies as a bug, though, on the basis that it is entirely possible that these effects were never intended to do anything.

Here's a list:

- You notice a pale fading ball of light upon entering this room. It quickly disappears.
- You hear an eerie wail for a few seconds...
- You hear a strange "*TCHUNK*" in your vicinity.
- A rat scurries between your feet and disappears in a small hole in the ground.
- For a few seconds you see a looming shade before you. It points its hand towards you in a threatening manner! Then it disappears.

There is also one pool effect that appears to do nothing and seems like it should:

-Your blood seems to cool down.

I suppose it is also possible that these effects do something, but it is so minor that nobody has ever noticed...