Incredible video of an out of control dump truck from the San Gabriel Valley.The passenger in the car behind it started recording on his cell phone right after the truck sideswiped a car on Valley Boulevard in Alhambra. Then it rear-ended another vehicle.The truck kept heading east going through seven cities.The giant vehicle crossed and swerved over the double lines repeatedly and then slammed into a line of cars in a left turn lane.San Gabriel police say the dump truck hit eight cars. Five people were hurt, including two who had to be taken to the hospital with non life threatening injuries.The driver appeared to be in some kind of medical distress when he was finally stopped.[credit: Bryant Sullivan / licensing@viralhog.com]