Surveillance video from inside the Children's House of Learning in Sorrento, Florida, shows a teacher pulling the chair from underneath a 4-year-old child, causing the boy to fall, investigators said.

Investigators said the boy hit his head on the chair as he fell.

Belinda Greer was arrested and is facing felony charges.

"It looks like a lapse in judgment, or she lost her composure for a moment there. It happened so fast," said Fred Jones of the Lake County Sheriff’s Office.

The student was not seriously hurt.

Authorities said they found out about the incident after the Department of Children and Families started investigating.

"DCF was notified by an anonymous tipster that there was a child abuse situation," Jones said.

Parents said they were unaware of the incident.

The day care staff did not want to comment to Channel 9.

“I can’t talk to you and you’re trespassing, and a Sheriff’s Department is on the way,” said a day care staff member.

The incident happened in April, but was only recently reported.