While traveling on Interstate 65 at alabama mile marker 295 I saw a semi hit two cars and a pickup. Did not see what caused it but the semi hit the pickup and totatly demolished it and it burst into flames and trapped the driver inside. The semi came to a stop on top of the car. I grabbed my fire extingisher and tried to keep the fire off the driver. We could get him halfway out the window but he was to big to get through the opening. Luckly someone had a saw and sawed the w/shield piller into and we were able to pull him out. His right leg was burned so bad the flesh was falling off. Guess he was in shock because he never said anything and the pain had to be terrible. Don't know what other injuries he may have had but we had no choice other than to pull him from the burning truck. have not been able to sleep for the past two nights. Never went and look in the car but I understood no one was in it. Every time I close my eyes I see the pleading eyes of the guy. Funny thing I can't even remember if he was white, black or foreign. all I could see was a fellow human suffering. If anyone was in the passenger side of the pickup they did not stand a chance of even surviving the impact and that side was in total flames. Terrible experience and I know this is not the place to post such but just can't seem to shake it. Have not been able to find out if he survived.