I surf the Concrete Wave, I gather it is probably in the same range as surfing H²O. I always wondered why when I felt really sad when I hop on my board and cruise I begin to feel better.
Flow to me is when the board is an extension of myself and feeling the gravity, wind and vibration come together to form a unique experience. Everything else goes on the back burner.
Edit: Spelling Error..
SHOOTZ! Thanx 4 the info, lady. <3