Parasyte

A man in a white coat is attacked by a creature with a long, white, tentacle-like appendage that has an eye on its tip, resulting in the man being thrown to the ground and bleeding. The scene cuts to a close-up of the man's face showing intense anger, then to the creature's eye, followed by a shot of the man lying on the ground with blood, and finally to a different man in a suit running with a terrified expression against a blue sky.