Here is a link of a video on Jeungsando.  enjoy.  http://www.jeungsando.org/article/article.asp?ID=86614626647547527551&menu=5&submenu=0&listpage=1

After the ceremony, She performed a work of renewal. A large pot of water was placed in the center of the yard, and beside the pot, a flagpole with a yellow flag was erected. Four flagpoles, each with a different-colored flag, were also erected in the four directions. Shortly afterward, thick fog and mist covered the area, making it difficult to see anything. In the course of the work of renewal, the mist soaked Tae-mo-nim’s and the disciples’ clothes. “Chahn-hohng! Chahn-hohng!” Tae-mo-nim suddenly shouted, calling for Go Chahn-hohng, a male disciple who was about ten years Her senior. She ordered him, “Undress Me.”   
At the time, Tae-mo-nim was forty-two years of age and still youthful. Having been ordered to remove Her clothes, Chahn-hohng was at a loss as to what he, a member of the noble class, should do. However, because the command was so stern, he cautiously proceeded with the task.   
Tae-mo-nim rebuked, “What worries you so much when you are simply helping your Mother out of Her clothes?” She continued, “All of you came out of My vagina.”   
As Chahn-hohng undressed Tae-mo-nim, he saw that She was menstruating. Her undergarments were soaked with blood. Even more embarrassed, he stopped in the middle of undressing Her, not knowing what to do or where to look.  
Tae-mo-nim grabbed hold of Chahn-hohng’s hat, turned his head to look at Her, and said, “What is so awkward about the hole out of which you came? What is so displeasing about it?”   
To make things worse, She yanked his head by the hat toward Her lower abdomen, crushing the hat. For Chahn-hohng, the feeling of shame was unbearable. He thought to himself, “Although practicing dao is important, how humiliating it is to be pulled like this toward a woman’s private parts.”   
Tae-mo-nim then ordered him, “Clean Me with a cloth.” She finished undressing Herself and shouted to the crowd, “You fools! All of you have come from My vagina! Everything under heaven has come from My vagina, you fools!” Many of the male followers belonged to the noble class and wore hats signifying their social status. They stood there in nervous agitation and turned their heads away.