Pod People (1983)

A hunter stumbles into a womb-like cave containing a clutch of alien eggs, which he destroys without a second thought -- doing little for the attitude of the mother, who proceeds upon a tri-state killing spree to avenge the loss of her offspring. All but one, that is -- discovered by young Tommy, who takes the egg home, where it hatches into a baby Philly Phanatic that Tommy dubs "Trumpy." Trumpy hoovers peanuts and popcorn by the bucket before developing a taste for hamsters. Meanwhile, the mother alien slaughters a rock band practicing nearby, just like Grendel does to the partying Danes in John Gardner's eponymous novel -- see, Grendel is metaphor for the Sapir-Whorf Hypothesis, so all the loud partying and singing drive it nuts, and it slays everybody just to shut them up, what with their self-limiting structures of conscious communication gumming up the works anyway. Like Grendel, the mama alien is eventually killed by somebody or other, but not before she thins out the human population, and Trumpy escapes into the woods to provide for the possibility of a sequel. Bizarro spaghetti-SF-schlock combination of E.T. the Extraterrestrial (which director Juan Simon is explicitly ripping off) and Dumbo (which he is not).