Ever see a ghost?

i my self don,t beleave but a friend said when after he was in a wreck fliped a four wheeler. after wakeing up at hospital he had seen and talk to his dead mom and dad. he was rearly shook up abount it. my other friend that has lost both his mom and dad too, i asked him if he had seen or heard from his mom or dad he said hell no they are both dead. als