Capt. Mark Bagley with the Cartersville Fire Department said a witness reported hearing a boom about 2:30 p.m. at the 100 Cherokee Place location.
When emergency personnel arrived, they found a Nissan Altima with a rear passenger window blown out. In addition, a Dodge minivan in the adjacent parking space also had windows shattered.
Bagley said authorities could tell some sort of projectile had come from inside the Nissan and hit the van's window.
At that point, the CFD and Cartersville police contacted the Georgia Bureau of Investigation bomb technician.
The tech determined that an aerosol can in the back window of the Nissan had overheated and exploded, shooting through the sedan window into the van before ricocheting into the parking lot.
"Luckily no one was hurt and luckily this was not a criminal act," Bagley said, adding that had someone been in either vehicle they could have been seriously injured.
There were no reports of injuries.
Man arrested after reporting to Walmart for 'community service'
A disorderly man was arrested late Saturday after he said he was reporting for community service.
According to the Bartow County Sheriff's Office report, deputies were called to the garden center area of Walmart, 101 Market Place Blvd., just before midnight after a man allegedly banged on the rear fire exit doors.
An employee said she found Christopher Elder, 29, of 216 Meadowbrook Road, Calhoun, trying to climb the fenced area of the garden center. When asked what he was doing, he said, "I am here to do my community service," according to the employee.
He told deputies he was there to do community service, although he allegedly did not know where he was.
A search of Elder turned up three knives and 38 suspected Alazapram loose and in an over-the-counter medication bottle.
Elder was arrested and charged with disorderly conduct, drugs to be kept in original container and possession of schedule IV narcotic.