Screenings of A Minecraft movie now have a disclaimer before the movie starts. This is most likely a response due to some of the reported ruckus happening in theaters showing the movie.
A recent recording of someone at A Minecraft Movie showing displayed the new disclaimer. It goes, “Be kind, be respectful. Remember that popcorn buckets are not to be used as Ender Pearls.” In Minecraft, an Ender Pearl is an item that can be thrown and it teleports the thrower to where it lands.
Cops have been called into showings of the movie in response to moviegoers throwing popcorn, so this disclaimer is presumably to dissuade this behavior.