MELBOURNE, Fla. -- Almost a dozen elementary school students watched in shock as a Brevard County bus driver threatened to beat up a student's mother.

Melbourne police said the mother got upset and confronted the driver Friday morning after she saw the bus drive away from the bus stop without her son. An argument between the mother and the bus driver broke out just out of view of the school bus surveillance camera, but the camera did capture the sound of the fight.

In the video you can hear the bus driver repeatedly saying, "Get inside, I'll beat you up."

Also in the video, you can see a bus full of elementary students looking on in disbelief. Among the students hiding in the rows of seats was the victim's 11-year-old son, who called 911.

In the 911 tapes you can hear him say, "The bus driver is telling my mom he's gonna beat her up."

Police said that during the argument, the bus driver picked up a three-foot metal pole and waved it at the victim while repeating how he planned to beat her up.

Saturday morning, Melbourne police arrested Alcide Pierre-Louis for aggravated battery.