There are also claims that you can smell burning flesh in the area of the cemetary where the bodies of young girls killed in an orphange fire are located. The two occasions I've been there however I have not felt anything major in this area.
According to this lady, there were 100's of them at the bottom of the hill. But as the M4 motorway is next to it I think it was more than likely headlights. I think she was pushing too hard, she also sent us photos of other tours that had things in them. I had them tested and they had been photoshopped. I doubt if she did it, perhaps other partisipants of ealier tours.