Help! Horror Movie On HBO Title Needed
 

Dying to remember the title.

This movie would have come out in the early 80s or so. All I can remember in my mind is a trailer from HBO that showed an alien of some sort.

He had the stereotypical huge alien head (i.e. swollen forehead) and huge (solid black) alien eyes.

What made it a horror movie, though, was the fact that apparently these alien things could shoot things (mini aliens?) out of the palms of their hands (a la Spiderman shooting a web) that attacked the human population of earth.

Please help, the future of my sanity depends on this.