Cine Libre Umeda announced the final showing of Mahou Shoujo Lyrical Nanoha The MOVIE 1st
on April 23rd. The audience are allowed to shout, sing, clap hands, and swing glow sticks at the theater. There has been two similar events held by Nanoha fans but this will be the first official "free-to-shout" showing.
The idea originated from a dojin manga, which described a possible situation of a theater showing the Nanoha movie.
GRINP's manga "I hate Nanoha Movie if it goes like this"
Nanoha fans gathered to realize the situation and Cine Libre Umeda kindly cooperated with them. It's not allowed to make sounds with devices, bring dangerous goods, and destroy the property of the theater.
Source: Cine Libre