It's usually when you're tired, during sleep, or when you're relaxing after a hard day's work/lots of stress that you have a seizure
. Kind of when your guard is down, although if you have refractory epilepsy
, or occaisional breakout seizures, it is frustrating. I often have had seizures while asleep, or while I play piano, actually. When "relaxing" so to say, but one can never predict 100%.