VIDEO : Theaters Post Health-Related Warning For 'Incredibles 2'

Theaters are posting warning signs ahead of Disney's **Incredibles 2**.
The new Pixar movie hit US theaters on Friday.
CNN reports the film saw the biggest box office opening for an animated movie ever.
Some scenes contain flashing lights that could affect people with photosensitive epilepsy.
Now, some theaters are warning audiences about the movie's visual effects.