I was wondering how you tell whether or not someone noticed you? If they make a comment, or otherwise react, either positively or negatively, then sure, you can tell. What if someone notices, but doesn't react in any way whatsoever? I guess you can be noticed, but not know you're being noticed. Or maybe you notice people not noticing you? Is it just the overall sense that people around you are in a fog, anyway, or your usual SA is just being tuned into such things? I'm not being sarcastic, just want to get your thoughts on that, so I threw out a couple of possibilities.