A school janitor jumped onto a driverless car circling a parking lot and another man helped him get inside to stop the vehicle moments before it would have plunged through the wall of a crowded classroom.

Larry Loy, 38, a janitor at Indianapolis Public School 89, hopped on the hood of the car after it ran over a 4-year-old girl and struck her 5-year-old brother and their mother."I timed it," Loy recalled. "So when I saw it coming around I jumped on the hood. I got on the top, and another guy ran up and flipped the door handle so I could get in."

The accident occurred Friday when Michele Footman began to drive away after picking up her son from kindergarten.

The passenger door was not secured, and her daughter, Michelle, fell out. Police said Footman jumped out while the car was still in gear.

Patrolman Michael A. Taylor said the car probably reached a speed of 25 mph as it circled the school parking lot. The car ran over the girl and struck her mother, and 5-year-old Sheldon also jumped out of the car and was hit.

The girl was in intensive care at Riley Hospital for Children. Her brother and their mother were treated and released.