A strange and not unalarming thing happened to me today.I was dropping my son off at school before driving on to work, a familiar route when, stopping at a junction, I couldn't remember where I was or where I was going.Now I, like most people, often find myself half-way up the stairs and not the faintest idea of what I was going up there for but this was very different.A feeling of complete disorientation for about 30-40 seconds.So, anyone else familiar with this, should I take more water with it, is this the first step in that exciting voyage that is senilty?All suggestions,explanations, advice,similiar stories welcomed.