I assume most of you have experienced this in some form or another: you practice something simple and repetitive (think Stick Control) at a very slow tempo. It feels really boring and you think it will take forever. You almost have to force yourself to continue. Then, after a while, suddenly something happens in the brain and it's not slow (nor boring) any more - it's almost as if you become one with the time, and no matter how slow the tempo is, it will feel
fast. ...and before you know it, the exercise is over and half an hour has passed.
I have always wondered what causes this shift in the perception in time? If you view slow practising as a sort of meditation, then maybe it's an effect of the mind relaxing and slowing down, and thus making the "external" time flow faster relative to the "internal" time. Or perhaps it's the repetitiveness that eventually causes the brain to give up and switch to "protozoan" mode? Or is it simply getting in the flow?