Is there anything I can do to improve this type of memory or is this just a reality of my mind? How do people of HN remember things? Any particular tools, techniques or resources used?
If you were talking about remembering things "on the fly", I can't tell you a lot about it. Generally speaking, your brain can be trained to a certain extend. So telling yourself you're just like that might hinder you more than your actual preconditions.
Chances are you were not watching, just attending and staring. Do you have your phone at hand in these events, by any chance?