Anderson Cooper interviews bus monitor Karen Klein about the verbal abuse she endured on tonight's AC360, 8 p.m. and 10 p.m. ET

By Faith Karimi, CNN

(CNN) - A profanity-laced video of middle school students in upstate New York verbally abusing a bus monitor is sparking an outpouring of support as strangers worldwide rally to her side.

Students taunted Karen Klein, 68, with a stream of profanity, insults, jeers and physical ridicule. Some boys demand to know her address, saying they want to come to her house to perform sexual acts and steal from her. Another said, "you're so fat."

One comment from a boy aboard the bus was especially painful. He told her that she does not have family because "they all killed themselves because they didn't want to be near you." Klein's oldest son took his own life 10 years ago, according to CNN affiliate WHAM.

The bullying continues unabated for about 10 minutes in the video, reducing Klein to tears as a giggling student jabs her arm with a book. Recorded by a student Monday with a cell phone camera, the brazen example of bullying went viral and spurred international outrage.

The incident occurred in Greece, New York, near Rochester. Klein is a bus monitor for the Greece Central School District and the harassers hail from the Greece Athena Middle School, media reports said.

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Tell us in the comments: We hear often about kids bullying kids, but have you witnessed or experienced kids bullying an adult at school, on the playground, on the bus or on field trips?