Tahiri's "unveiling herself" caused some Babis to recant their new faith or slit their throats!!!

The unveiling caused shock and consternation amongst the men present. Prior to this, many had regarded Táhirih as the epitome of purity... 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.

-Wikipedia

Here is what one ex-Baha'i claimed regarding this incident.