i was playing stalker: shadow of chernobyl and the worlds biggest pack of dogs wandered by
At the trainyard, not far past the entrance to the town with barkeeper? I used to get that a lot as well. I eventually got fed up killing them and just jumped across as many rooftops as I could to go around them.
![concrete.png](http://img827.imageshack.us/img827/2494/concrete.png)