Inveterate gnashnab & snoutband
I've experienced what I'd call being "in the zone". To me it means that one's concentration is so intense that the activity one is engaged in becomes effortless and free-flowing. It used to happen when (don't laugh) dealing roulette at a packed table. The ball's spinning and you've got people throwing chips and money at you while shouting out their bets, and you're doing all this mental arithmetic, and it's a stressful, frantic, frenetic situation. Then all of a sudden it's like things start happening in slow-motion and you find it all so easy to cope with. That to me was being 'in the zone', and it was wonderful while it lasted."In the zone" regarding physical activity happened with me only once, playing darts. Interesting, because alcohol was involved too. Now, I've drunk alcohol while playing darts many other times, but the phenomenon didn't repeat.
What is this "In the zone"-ness as encountered by top athletes? It seems to be the same phenomenon as "being exterior", often (heatedly) discussed on ESMB.
Alcohol can lead to a temporarily altered mental state too. Think I'll stop here.