A 49-year-old mother was booked on suspicion of battery after allegedly pushing and shoving a student at Glendora High School who she claimed was being rude to her.
The incident took place Friday and was captured on cellphone video, which apparently showed Erin Lisa Sims grab a teen and try to pull him away when another student -- believed to be her son -- hits the teen in the back with one of his crutches, Lt. Matt Williams with the Glendora Police Department confirmed.
The video, initially obtained by Glendora City News, then shows a third student -- apparently the brother of the teen who had just been struck by the crutch -- walking toward Sims' son.
Sims went back over and appears to shove the second teen, tearing his shirt, Williams said.
Sims can then be heard shouting expletives at the teens before a school official arrives to break up the altercation.
Police arrested Sims on suspicion of misdemeanor battery, according to Williams, who added that the mother had been released on $500 bail.
Sims claimed she was trying to break up a possible fight and the first teen was being rude to her when she grabbed him by the shirt to take him to the administrator's office, Williams said.
A neighbor of Sims told KTLA the behavior was unusual for her.
"They're all cool. I don't know what exactly happened. It must have been something before the camera started rolling obviously. But I don't see them fighting like that," said the neighbor, who did not want to be identified.