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 AMC supervisor Mauricio Mencia, who's worked at the Universal CityWalk location in Los Angeles for the past year, says, "I've never seen something like that happen." 
 
 The memo, which has been shared on social media, says: " 'Incredibles 2' contains a sequence of flashing lights, which may affect customers who are susceptible to photosensitive epilepsy or other photosensitivities." 
 
 Mencia's theater has informed the staff about the memo and posted the warning next to the guest greeter who rips tickets. 
 
 According to the Epilepsy Foundation, "for about 3 percent of people with epilepsy, exposure to flashing lights at certain intensities, or with certain visual patterns, can trigger seizures. This condition is known as photosensitive epilepsy and it's more common in children and adolescents, especially those with generalized epilepsy and a type known as juvenile myoclonic epilepsy." 
 
 Jackie Aker, director of media relations for the Epilepsy Foundation, says her organization had never before called for a movie to issue a photosensitivity warning, but earlier this year asked Apple to change a promotional spot for the new iPad that had flashing lights that would be unsafe for certain viewers. Apple worked with the foundation to change the video. 
 
 In 1997, an episode of "Pokémon" that aired in Japan with flashing lights sent nearly 700 children to the hospital. ||||| This is not a joke. I was at a first-night showing tonight, and my immediate thought was how disasterously unsafe this movie is for my photosensitive epilepic friends. @markingatlightspeed I’m tagging you with this specifically because I feel that this would be extremely dangerous for you to watch. 
 
 
 
 There are multiple scenes in this movie with full-screen, black-and-white flashing strobe effects. They all happen without warning, and last anywhere between a few seconds to more than two minutes. In a darkened movie theater, this means the likelihood of a seizure could be VERY HIGH if you are sensitive to these effects. 
 
 
 
 If you have photosensitive epilepsy or another disorder that is triggered by strobe lights, I would highly recommend you DO NOT SEE THE INCREDIBLES 2 IN THEATERS. Wait until the movie’s released on digital/Bluray, and you can watch it in a fully-lit room, with someone with you who will be able to help if the strobe effects do trigger a seizure. 
 
 
 
 Please stay safe. 
 
 
 
 UPDATE: After talking to some people who have loved ones with severe epilepsy, I would sadly have to recommend that you DO NOT SEE THIS MOVIE - PERIOD - IF YOU HAVE SEVERE SEIZURES WHEN EXPOSED TO STROBE EFFECTS. DO NOT PUT YOUR HEALTH AT RISK FOR A MOVIE. NO KIND OF MEDIA IS WORTH GAMBLING WITH YOUR LIFE. 
 
 
 
 The scenes in which the flashing happens are MAJOR plot points and CANNOT be skipped. The one workaround I can suggest would be to find a version of the movie (when it’s released) with Audio Descriptions for the visually impaired. Watch it on your PC - turn the monitor OFF, but keep the audio going. 
 
 
 
 If you have been disappointed by the creative decisions made by Disney-Pixar, please sign the petition created by @moviehealthcommunity for Disney to include a seizure warning for moviegoers and people who buy/rent the movie. It is unlikely they would edit these things out of the movie entirely - but there are nearly 20,000 notes on this post, and if 20,000 people asked them to consider people with epilepsy, it could mean they consider these things more carefully in the future. 
 
 
 
 Thank you. ||||| Twitter thought the bright flashes of two short videos it posted via Vine would attract viewers. An epilepsy support group in Britain thought the flickers would cause seizures. 
 
 “Your #DiscoverMusic Vines are massively dangerous to people with photosensitive epilepsy. Please take them offline now,” Epilepsy Action tweeted Friday. 
 
 Less than an hour later, a Twitter representative responded that the company had done just that. 
 
 "For a huge corporation like Twitter to take that risk was irresponsible," Epilepsy Action’s deputy chief executive, Simon Wigglesworth, told the BBC. "That first seizure can often come out of nowhere," he added. 
 
 Epilepsy Action, a charity organization based in Leeds, Britain, could not be reached. 
 
 Joseph Sirven, editor-in-chief of the Epilepsy Foundation’s website and chairman of the neurology department at the Mayo Clinic in Arizona, noted that the incident points to a long history of video-oriented industries learning to keep content safe, often by providing warnings on packaging or promotions for flashing content. 
 
 “Before it was about TV. Next was computers, next was video games and next is phone,” Sirven said. As apps, animations and videos flood through mobile devices, unanswered questions include: How do you safely broadcast on a phone or tablet? 
 
 About 3% of people with epilepsy can suffer seizures from exposure to quickly changing visual patterns such as flashing lights, according to the Epilepsy Foundation. 
 
 Twitter’s videos, which can no longer be viewed online, apparently promoted Twitter’s #DiscoverMusic campaign. Created with the video app Vine, they played quickly changing colors in a loop. 
 
 Twitter and Vine did not respond to requests for comment, and it was unclear if they have policies in place to screen content for material that could harm photosensitive people. 
 
 Epilepsy Action raised concerns over flickering video content in 2012, when people said they suffered seizures from an Olympics TV promotion that featured a logo that rippled with colors. The promoters agreed to edit the piece. 
 
 In 1997, an episode of animated Japanese TV program Pokemon that blared red strobe lights reportedly caused hundreds of viewers in Japan to suffer seizures. 
 
 Twitter: @dainabethcita
– After anecdotal warnings circulated on social media, Disney has issued an official seizure warning for Incredibles 2. Both the film and the trailer contain flashing or strobe light effects, which can cause seizures for some epileptic viewers; the Epilepsy Foundation spoke out about the issue, and a petition called for Disney to include a visual warning about the lights. On Friday, Disney asked theaters showing the movie to include such a warning, reports CNBC, which calls it an "unprecedented" move by the company. The lights can also affect people who suffer from migraines or have other conditions causing them to be photosensitive. Disney's official memo reads, "Incredibles 2 contains a sequence of flashing lights, which may affect customers who are susceptible to photosensitive epilepsy or other photosensitivities."