I've heard people say the air gets real thick and heavy and it's overwhelming the feeling of eyes on you and sorrow. You just wanna get outta there. That's that 6th sense I guess ? I've felt uncomfortable before in places but I imagine the true "feeling" is much stronger and definitive?On another trip with my wife, daughter and son in law we did a ghost tour in Edinburgh, Scotland that included an underground part. We didn't see or hear anything but I will never go down there again. Portions of it gave us all the feeling we were being watched by more than one hidden presence.