Woman's scream

What is the purpose of the bloody mask at the beginning of "Death Lullaby"?

In fact, this scene was created so that a ''woman's scream'' could be played from the back of the theater using a tape recorder.

J・A・Seazer's ''Banyu Inryoku'' theater company, which inherited Terayama's experiment, repeatedly performed ''Nuhikun (Directions to Servants)''.
During a re-performance in the 1990s, there was a scene in which an actor sneaked into the audience and emitted white smoke from his chest, causing him to faint in agony. Harada could not forget this performance.

Theaters should be able to express themselves more freely.