Some famous examples of a "10x developer" state: Linus Torvalds writing Git, Brendan Eich writing JavaScript. Somewhat less famously, I get that feeling often when I stop thinking and start doing on an electronics project, a wooden shed or even a cosplay. Every hackathon ever, same principle - stop thinking, start doing.

But it's only a 10x state if you're doing the right thing, otherwise it's a -10x state, and that means you need to have already done the right amount of thinking and have a good intuition for what you're trying to do. (As long as you can recognize a failed experiment and revert, risk of being -10x isn't that terrible)

This is such an obvious observation that I’m surprised to find it often missing. 0.1X is nothing compared to the destruction (ie negative X) you can do with the right combination of recklessness and managerial pressure. Definitely happens with engineers. Perhaps even more with PMs.