Did ya ever run and miss a turn? I was out the other day at oh dark thirty and missed my regular turn through a church parking lot. I must have been zoning and discarding "baggage" and missed the turn I usually take. It dawned on me that I wasn't sure where I was and then realized I was at the far end of the lot. My wife said it sounds like the IPod commercial but I didn't have music. It was all mental.