Normal sized flies with human heads

When Seth Brundle makes a huge scientific and technological breakthrough in teleportation, he decides to test it on himself. Unbeknownst to him, a common housefly manages to get inside the device and the two become one.

Test space rockets exploding at liftoff and increased reporting of UFO sightings culminate in a direct attempt by alien survivors of a dead, extra-galactic civilization to invade Earth from impervious flying saucers, using ray-weapons of mass destruction.

an abnormally large fly is spotted flying over Oslo with malicious intent. the fly is seemingly invincible, or at least that was what it thought, until it messed with the wrong guy: an angry priest by the name of Father Jeppe

Flies hover over a man’s head. With every bite, flesh opens up, bulging out of skin until all explodes into blood.

A man is standing in the scene when a fly arrives and begins to irritate him. He tries to swat the fly, but it keeps growing bigger to the point where it shatters the scene. Eventually, the man and the fly decide to negotiate.

With closeup footage of flies and simulations of their vision.