This is a bit of a weird one. I'm in my 40s, and every so often a memory pops into my head of something that happened to me when I was at school in London, during the 80s. I get two images in my head. In each one I'm in a room in an area of the school that we would never normally go to unless it was sanctioned by a teacher. In the first image, I am sitting with an adult going through one of those psychological tests- a stack of cards which each have lots of coloured dots on them, and you have to try and pick out a number which is hidden amongst the dots in a slightly different colour. The other image is more disturbing. I am sitting in the same room with a young Asian man, some kind of mask is put over my mouth and I'm asked to take a deep breath in. It tastes sharp and peppery and unpleasant. These memories make me feel.... strange. I'm not sure if something untoward was going on but I find it very difficult to hold onto these memories when I have them. In that, I'll say to myself "I should investigate this further" but then my brain immediately blocks it out until it pops back into my head many months later. I suppose my question is, does anyone know why the mask test might have been carried out? An innocuous reason like checking for asthma or something? Or did anyone else have a similar experience? The memories feel so slippery that the closer I try to examine them the harder it is to hold onto them, and I wonder if my brain is playing tricks on me.