Seriously... are you KIDDING ME...
[spoiler]
I was trying to kill the Knight but kept getting shot from behind... but couldn't figure out WHERE I was getting shot from... Then I realised the damned building was shooting me.
Either that or the enemy managed to get under the map... cheating barstewards. LOL[/spoiler]
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Never saw them that far in, but I have seen them go half way in to the building before. Usually if you throw down a grenade by it or shoot a rocket where they are, it will get them.