patrice moore travels here. this is what her prius looks like now after it was struck with a run away trailer. >> the cars and it's going sideways. it was coming closer to me. i just, as soon as i stopped look at in the rear view mirror, i was ready for impact. i knew it was happening. >> reporter: she said she was sore, several others had to be taken to hospitals. one is in critical condition as one vehicle after another got hit or smashed into the guardrail t. driver got tangled up with the big rig. the truck driver told chp his brakes failed. >> he experienced a brake fade coming down a 6% grade approximately, was unable to control his speed at which time he started hitting vehicles on the guardrail. >> reporter: the rig jackknifed and smashed knew a guardrail t.chp elite multidiscipline investigation team was called in to document and analyze what happened. they found tires that came off their action els along with scattered debris and cracked windshields. they said the rig is knew and went through a safety