Why Do I Remember Little Robed Monsters???

I just bought the dvd 4 pack because I remember the impact these had on me as a kid. I was a horror fanatic who went to baptist church in Owasso, Oklahoma (!) every week, lol. I remember thinking it was the coolest thing ever to be watching these low-budget flicks with people getting their heads cut off by guillotenes and horror-themed violence.

Now I have only watched the first three, and plan on watching the 4th one either tonight or tomorrow night, so I haven't completed them, but for some reason I seem to remeber these little radiation dwarf-monsters in robes that tried to attack Patty in a car. Well darn it, now Patty's done got her noggin chopped off, and still no little monsters! Maybe it wasn't Patty, but this new Kathy girl, and maybe it's in the 4th one. I guess I'll find out.

I also vaguely remember some underground hideout with a trap door in the grass. I know the little boy hid in the hole at the end, but I'm 99% sure that wasn't what I was remembering. Maybe I'm getting movies mixed up. Perhaps with the monsters I'm mixing these movies with Return Of The Jedi - LMAO.