I’ll just toss in some more anecdotal evidance for the phenomena. I’ve noticed it while skiing. Now, I’m hardly a good skier (I’m quite happy on my blue slopes, thankyouverymuch) but every now and then I will have a run or series of runs where everything just comes together; perfect line, perfect carved turns, an absolutely exhilirating run. The next day, I’ll fall getting off the lift.
This is different from random chance; this isn’t a “hey, I didn’t fall that time”. Everything just comes together naturally and suddenly it’s as natural and easy as breathing. It’s hard to really describe; all I can say is that when it happens you know.
It’s like UncleBill described; it’s almost like your mind is detatched from what is happening. You suddenly aren’t thinking about what is happening anymore and are just doing the right things at the right time. It is almost a zen-like thing. Really cool when it happens.
Of course, it doesn’t happen enough for me to keep me from breaking my wrist the last time I was at Tahoe, but still…