An employee was operating a paratransit bus when the car driving ahead of them suddenly stopped short, causing the employee to suddenly stop the bus. It is not known if the vehicles contacted each other. Two people got out of the car and began to argue with the employee, then went back to their car and got a metal pipe. The employee exited the bus to inspect it for damage. The two people then assaulted the employee with the metal pipe. The employee was hospitalized with a skull fracture.