If you happen to be at the office at home, wherever, doing something that you were very focused on, do you miss everything else that happened? Say, if there was an announcement on the intercom, and you were asked later what the announcement was, would you answer “I didn’t even know something was announced on the intercom, never mind what was said”? is that imaginable? What prompted this question is:
https://www.youtube.com/watch?v=vJG698U2Mvo