I’d placed the turret on the ledge above, looking out the window. It got killed and the HUD indicator ‘fell’ to the ground giving the appearance on an invisible turret (also notice the laser middle left) -
[0663.16] Log: Log file open, 02/24/13 18:06:54
[0663.16] Log: Dumping BugIt data chart at 2013.02.24-18.06.54 using build 8710 built from changelist 16609
[0663.16] Log: MapName: OBJ_LondonBridge
[0663.16] Log: Description:
[0663.16] Log: BugItGo -3168.1985 44.8861 -17.2428 -2130 -32250 0
[0663.16] Log: ?BugLoc=-3168.20,44.89,-17.24?BugRot=-2130,-32250,0
[0663.16] Log: ---=== GameSpecificData ===---
[0663.16] Log: Log file closed, 02/24/13 18:06:54