sheepdragon: As far as epileptic seizures go, that can be triggered by any number of things. I used to have epilepic seizures, followed by temporary partial paralysis, caused by sleep. That largely went unnoticed, though occasionally I woke up under my desk, unable to feel or move my entire right side. I've also heard of people with seizures triggered by specific voices, and such.

Shalgroth: Well, I feel like quite the cad.
I don't have epilepsy, as far as I know. Can't remember if it was a CAT scan or MRI some years back revealed a rather healthy brain i.e. no spotting.
Bad humour on my part. =/
Though epilepsy caused BY sleep? That's very strange.. Would never have thought it possible.
Agree with the flashing lights being overwhelming. Sometimes I have no idea where the plasma balls I'm trying to dodge have gone. Gets pretty damned busy on screen.

sheepdragon: Heh, I wasn't offended or anything, I just felt like mentioning it, since epilepsy was mentioned a couple of times. But if you look at the wikipedia article about it, you'll see that there are over 40 variations of epilepsy, with any number of things causing seizures.