. >> reporter: people like brandon gephart who was at the theater with his girlfriend. >> he scared me big time. >> reporter: when he was overcome. >> i sat up and next thing i know, i'm just waking up to everyone shaking me in the whole theater looking at me. >> convulsing and snorting and trying to breathe. >> reporter: the problem apparently is one particular scene in the movie. the birthing scene. there is lots of flashing red lights that can have a serious effect on people with photosensitive epilepsy. >> it's like the light switch going off because it hits the whole brain at once. the trouble with the theater it's dark. lights flashing is more like a strobe light. >> i had to take a few breaths. >> reporter: bridget did not have a seizure after watching the movie but says she was very much affected by that birthing scene. >> can you see where that scene would make some people have seizures? >> i could. because there is a lot going on with the lights. it's just terrible. i can't talk about it. have you seen it? >> reporter: no. and i'm not sure i want to now. the epilepsy foundati