Told this before in other places, and loosely speaking, it's kind of timely.
20 or so years ago, re-playing the original Half-Life (thus "timely" because of the recent updates and 25th anniversary of it), I had a relative sat behind me watching me play.
They asked me a question about something or other, and I immediately turned around to answer them.
In game.
I still remember where I was in the game and the milliseconds of confusion, realisation and feeling of stupidity.