Thanks Lex and Lee. Re; 'Aliens' and communication. I've lived in 7 countries over a 50 year period. The only events of note over this period were 2 encounters in central London in 2009 over a period of ~2 months. The first encounter was with an individual who appeared to notice my attention. The individual was dressed absurdly/inappropriately. Despite my best efforts to approach 'him' I could not and experienced 'panic' attacks at the 'thought' of reproach. The more I 'wanted' to approach the individual the more I could not. The 'thoughts' of doing so appeared to be 'sucked' from my mind. I eperienced extreme fear. By the time I had walked the length of the street (Brick Lane) I could not return. The second encounter (also Brick Lane) was with a ~7 year old boy dressed in what could be described as an absurdly 'preppy' Ralph Lauren outfit (a child wearing adult clothing). He approached me directly and attempted to talk but spoke in a guttural language I could not identify. 'He' then exited the building. I could not get up to follow him despite best mental effort. I followed as soon as I could but could not find him anywhere. At all. I cannot explain either of these encounters in a reasonable/rational way.