There was a chain-reaction type of accident yesterday involving three Madison County school activity buses and a pickup truck and it left 48 students and an adult injured. According to said N.C. Highway Patrol Trooper Ron Crawford, who witnessed the accident, none of the injuries was considered life-threatening. The wreck which involved sixth-grade students from Madison Middle School occurred just before 10am on U.S. 25-70 near the Madison campus of Asheville-Buncombe Technical Community College.  About 200 sixth-graders, the entire sixth-grade class at Madison Middle, were riding on the three buses and a fourth that avoided the crash. The group was heading to Asheville on a field trip. Thirty-three of the injured students were taken to nearby Mashburn Medical Center, while 15 students and an adult bus driver were transported to Mission Hospital in Asheville. The accident happened when a motorist traveling south on U.S. 25-70, being followed by four school activity buses, stopped to make a left turn into the A-B Tech parking lot. The first two buses stopped, but the third bus in the line did not, slamming into the rear of the second bus. The second bus, after being hit, sideswiped the first bus. After rear-ending the second bus, the third bus crossed the center line and collided with the northbound pickup truck. The bus then traveled down a grassy hill and crashed into the side of the brick A-B Tech building. No one in the building was injured. The driver of the fourth school bus managed to avoid the accident altogether. Madison Middle school Principal Barbara Tipton said that she felt fortunate there were no life-threatening injuries.