A radical-feminist opera performance has left 18 audience members needing medical treatment for shock and nausea at the Stuttgart Opera in Germany.

Performed at one of Europe’s foremost opera houses, the Sancta Susanna ("Saint Susanna") opera has an age restriction of 18 and includes explicit lesbian sex scenes, real blood and injuries, naked roller-skating nuns and much more, reports the Daily Mail (a warning: the Mail article contains images that some Herald readers may find offensive/upsetting – as does the trailer on the Stuttgart State Opera website).