This phenomenon is being referred to as ‘the zone’
Ever had that feeling of playing on auto-pilot, very well, and as soon as you realise you start playing badly?
Your alpha brainwaves will spike when you are in ‘the zone’ and you will gain unbelievable skill, I have been doing this and the results have been great, just yesterday I pulled off a 4-man ace (5v5) in CS:GO something I have never done, using this method.
It's the same as how your brain works automatically e.g. moves all you muscles without doing them individually.
This phenomenon is usually only associated with a state of complete rest, such as during meditation… known as the Flow State, and sometimes referred to as entering "The Zone"
"Flow State is an optimal psychological experience. It's when you're functioning on auto-pilot, when everything clicks into place and goes right," said Dr Costas Karageorghis, lecturer in sports psychology at Brunel University, UK.
HOW TO Flow State