RETZ is a U.K. based theatre troupe that uses technology, such as Twilio, to enhance the audience experience in their productions. They are encouraging audience members to use their phones during performances, adding an interactive element to the show. The production of Franz Kafka's "The Trial" is using Twilio to provide a pre-recorded voice message that builds on Kafka's work, allowing the audience to unlock additional content. This approach has allowed RETZ to push boundaries and create a unique storytelling experience for their audience. By leveraging democratic technology like Twilio, RETZ is making theatre more accessible and engaging for everyone.