Waltham, MA - A reported car on its roof with entrapment on February 8th sent Waltham Engine 3, Rescue 1 and Medic 1 to Warren and Beaver Streets. Engine 3 signed off with a three-car accident, with one on its side without entrapment. Rescue, however, stabilized one of the vehicles. Medic 2 was also requested. One person was taken to Newton Wellesley with minor injuries and three others refused treatment.