yes, i have, many times. mostly during depression and mixed states i have the feeling that nothing is real. i am usually real but the world isn't, i am no part of it and that makes me feel afraid of speaking to people and react slowly and feel even more depressed.

when hypo i am not sure, sometimes everything is just so fast that i lose track of the fact that the world is real and i don't care about anything i do because it feels like just a game...