Why do dead bodies move and make noise?

Death is supposed to be the end of the road. The lights are out, the curtain has fallen. No breathing, no heartbeat—end of discussion, right? Not quite.In some cases, corpses twitch, flex, shift, change positions, or even make noises that could easily be mistaken for messages from beyond the grave. But before you call the Ghostbusters, take a deep breath. The explanation is less zombie apocalypse and more basic biology. Even after the heart stops beating, the body still has a few tricks left