Train would be a lot of monsters in an area, and loc would be the location. I've noticed a few areas like that, where the spawns are already there, or in some odd places, usually close to where I'd be expecting them. Most likely the result of a char or chars that couldn't deal with them. Most of the time it's no big deal to either avoid, or confront the creatures, but sometimes you can't do either, and are forced to run. Happens to us all at one point or another.
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