Night terrors

I've just had a really horrific nightmare, and now I can't get back to sleep. I dreamed that I was trapped in a coffin, fighting to get out. I'd pounded my hands and knees into a bloody, splintered mess before I finally managed to rock the coffin from the table with my struggles, smashing it into pieces. When I emerged from the debris, I found that I was at my own funeral. There was only one person there, and he was asleep.