Grandfather's involvement in WW2

My grandfather was Joe Sills, crew cheif of the 335th Fighter Squadron which was apart of the 4th Fighter Group in WW2 stationed in Debden, Essex, UK. I remember him telling stories about the war when I was little. Most were about pilots in his Squadron getting shot down and surviving. I heard numerous stories of his pilots having to eject in the middle of the sky after being shot down. My fav. story was about a pilot who was shot down but was stuck in his seat and could not eject. He ended up having to cut his seatbelt off with a knife to eject seconds before it would have been too late. He also had roles of film takin from the cockpit of  pilots in his squadron doing missions in Germany. I remember one film displayed a pilot dropping bombs on a Nazi bases in Germany and obliterating everything on the ground. There is also a website with stories, pictures and videos dedicated to the Fourth Fighter Group. http://www.fourthfightergroup.com/