Check this and read the explanation below... 

From youtube:

"Renton, WA - Surveillance video shows a King County Metro bus driver punching, kicking and throwing a large object at a passenger who did not respond to requests to exit a bus.

The incident occurred last month at the Renton Transit Center after a rider refused to exit a bus at the conclusion of its route. The passenger, appearing to be asleep, is roused multiple times by the driver to no effect. The standoff ultimately escalated to a violent confrontation, with the driver employing physical force akin to a barroom fight.

The video shows the 61-year-old driver, Dennis J. Echols, unsuccessfully trying to wake up the passenger, Ethan S. McKinney. McKinney, 23, appears unresponsive but not aggressive. The video shows Echols as he becomes more and more aggravated by McKinney's failure to exit the bus.

Echols then threatens McKinney with a large tire wedge. The driver then hits McKinney with wedge after McKinney spits at him. Echols then pins McKinney against a bench outside the bus and strikes him seven times and then throws him to the ground.

The incident ended after Echols called 911 and two Renton Police officers responded. McKinney was taken into custody after refusing to cooperate with the police and tried to leave the scene. Echols was charged later after a King County Sheriff's detective investigated and determined the driver was also responsible for the violent confrontation. He has since been fired.

In an incident report written afterward, Echols wrote, "He spit in my face. I lost it."

Echols was terminated from his job on December 4; Echols and Mckinney were both charged with assault and were arraigned in King County Superior Court on Wednesday. Both men declined to comment to KING 5.

King County Metro General Manager Kevin Desmond said Friday that Echols' actions were "inexcusable, appalling and unacceptable."

"Spitting is a felony assault, so what the passenger did was wrong," Desmond said. "But that in no way excuses the driver." Desmond said the driver should have called for help from personnel inside the transit center.

"This driver's reprehensible actions were an aberration from the fine work Metro employees do every day. Our drivers often face difficult-and sometimes threatening-situations, and respond appropriately," Desmond said later Friday in a statement sent to the news media."

This is inexcusable, but do you think bus drivers in the Puget Sound are overworked and that's why something like this happened?