The unveiling of Tahirih

Bábís were divided somewhat between those that viewed the movement as a break with Islam, centered around Táhirih, and those with a more cautious approach, centered around Quddus. As an act of symbolism, she took off her traditional veil in front of an assemblage of men on one occasion and brandished a sword on another. The unveiling caused shock and consternation amongst the men present. Prior to this, many had regarded Táhirih as the epitome of purity and the spiritual return of Fatimah, the daughter of the prophet Muhammad. Many screamed in horror at the sight, and one man was so horrified that he cut his own throat and, with blood pouring from his neck, fled the scene. Táhirih then arose and began a speech on the break from Islam.

https://en.wikipedia.org/wiki/T%C3%A1hirih