I saw john Malkovich in a play once, that involved a moment where the curtain closed halfway, lights turned on, and paramedics came onstage. This was in German

I saw john Malkovich in a play once, that involved a moment where the curtain closed halfway, lights turned on, and paramedics came onstage. This was in Germany and they were wearing local uniforms. That made it seem rather authentic. I remember being somewhat certain that it was an act, and there were no indication from the audience that anybody fell for it (panic, leaving, yelling "I'm a doctor").