Cinemeblend reports (via CBS), Brandon Gephart of Sancramento had a seizure as a result of the birth scene in Breaking Dawn. Gephart’s companion stated that he was “convulsing, snorting, and trying to breathe." The shocking thing is that this is not the only incident that has occurred due to this scene.There have been several reports of movie goers having violent seizures and epileptic attacks during the scene.
Apparently there is a lot of blood and flashing colors in the scene, which seem to cause these seizures.
If you're going to see this film in theaters, be warned!