What’s the quietest move you’ve ever made?

I was just watching a game where someone moved a pawn two squares forward—no capture, no threat, no fanfare. And for a second, the whole board seemed to hold its breath. I’ve been thinking about that kind of move ever since: not strategic, not dramatic, just… present. What’s the quietest move you’ve ever made, either in a game or life? Not the one that changed everything, but the one that felt like it mattered even though nothing happened.