When Yvonne asks all the women who've been whistled at, beaten up by a man, or called a bitch, whore or slut to cross the line, every woman in the room takes a step forward.
"I've been in situations where I felt so vulnerable as a woman and I had no power," Lisa says. "Every woman has gone through it."
As the men and women face each other, Yvonne asks the men to look into the eyes of their classmates and imagine that these women are their mothers, grandmothers or sisters. Many of the men are surprised that catcalls and sexist "jokes" have had such an impact on the young women in their school.
"Watching people cry because they've been whistled at, they've been honked at...it's not funny," Charles says. "It's not fun and games."
Riley, a male student who has an older sister and was raised by a single mother, says he would never want to see his family members go through the same thing as his female classmates and teachers. "It was horrible," he says.