"Twilight: Breaking Dawn" has been seeing the kind of box office revenue that can only be sparked by vampire-werewolf-fervor.
But the film is now getting attention for a reason that has nothing to do with the supernatural love triangle: Reports that a gory birth scene during the birth of a half-human, half-vampire baby has triggered seizures in moviegoers around the country.
California man Brandon Gephart reportedly ended up on the theater floor after the graphic scene when he saw the movie Friday night with his girlfriend.
Gephart told Sacramento's CBS 13 he doesn't remember anything until he woke up on the floor, but his girlfriend described him as "convulsing, snorting, trying to breathe."
“He scared me big time,” Kelly Bauman said. Paramedics took Gephart to the emergency room and the theater canceled the rest of the screening.
According to CBS 13, at least a half-dozen other claims have popped up on Internet sites.
A similar incident was reported in a Utah theater when an unnamed man told he went to see the movie with his wife.
"I didn't really remember what happened after that I think I blacked out. According to her, I was shaking and mumbling different noises," he told Salt Lake City's ABC 4 News.
His wife was sitting next to him and described what happened next: "He started mumbling and he was blinking on and off with his eyes at that point. I was kneeling in front of him slapping his face."
They left the theater early, but in the process the man said he forgot his phone.
"When we went back the next day we actually found out it happened to another girl in the theater," he told the station.
Medical experts said the scene, which features flashing red, white and black images, could have triggered episodes of photosensitive epilepsy among those who are genetically predisposed.
"It’s like a light switch going off, because it hits your brain all at once," Dr. Michael Chez, a pediatric neurologist, told CBS 13.
Neither man said they'd ever experienced a seizure before. Chez said a single seizure should not cause long-term damage to most patients but that to combat risk and be on the safe side, moviegoers can wear sunglasses with blue lenses to filter out the red light.