When epilepsy is talked about, most people think of Tonic-Clonic seizures, formerly known as grand-mal, where the person suffers stiffness and jerking.
Very few people think of Absence seizures, formerly known as petit-mal. I suffer from this but only have a seizure once every couple of years. I totally lose all awareness of anything and go in to some sort of trance. For many people they snap out of it automatically. I almost snap out of it but then have to ask somebody where I am and what I was doing. Once I have that anchor I can get myself back on track.
This is fine if I'm with friends or in a building where it is obvious what I was doing (eg in a library reading a book) but I've had it happen in a street where, from what I can ascertain from the policeman who came over to help having been alerted by CCTV operators, it took 5 minutes of asking people to help before somebody realised I wasn't a crazy lady but REALLY needed somebody just to tell me what street I was in and what direction I had been walking in.
I haven't let this effect my life but it would be easy to hide at home 'just in case'.