Slither!

"Slither" obviously pulled lots of inspiration from "Night Of The Creeps", Both films feature plagues of small parasitic worms which come to Earth in a meteorite. In both films the worms enter people via their mouths and transform their hosts into zombies. During the climax of each film, the heroes use flammable gas as a weapon, creating an explosion which finally destroys the alien menace. At the end of both films, a small surviving piece of the alien attaches itself to a domestic pet. Don't get me wrong, I loved "Slither", it was very funny, fucking gross, and creepier than "Creeps"!