Los Angeles County, 22 eastbound freeway in Gardena today. A lady was rear ended in her Chrysler Sebring. The car caught fire and she was unable to unlatch her retraint system. SEVERAL motorists stopped. Two produced fire extinquishers which had little effect on the blaze. They were all screaming " anybody got a knife? " Nobody had a knife. A motorcycle officer arrived. He had a knife. They were able to cut the belts and literally pull her out with burning hair as the tank finally popped.