When? I'd say somewhere around 1400!
Well, I mean during the game. Should I begin during the mid game or end game or the opening?
There are a lot of traps in the opening, so probably you should start as early as possible.
but what's the chance of me having a game like that though?
look at every single one for both sides. You dont need to go into huge depth, but at least note all the responses for each forcing move. If anything looks interesting you can examine further.
Honestly, I had no idea chess was that simple. When I play, I really don't look for checks or captures. I just subconsciously play without being aware of what I'm doing.
Heisman says that those who don't have a habit of looking at all forcing moves are artificially limited to U1600 tournament elo as they are never completely safe from 1 move blunders.
Chess is that simple? Well I suppose. Congrats on discovering one of the necessary (but not sufficient) conditions of rising past class C due to e.g. not moving pieces to undefended squares that are attacked.