This movie is a B horror film where the main antangonists are these alien pods that resemble glowing brains. When the "brain" like pods are shown on screen, they slowly pulsate a yellow color and moan. As the pod becomes agitated, it begins to pulsate faster and the moaning becomes paces just as fast with the flashing of the pod. After a few seconds of this, the pod explodes covering its victim in a horrific goo and killing them instantly. This is not "Invasion of the Body Snatchers"

Contamination (1980) (http://www.imdb.com/title/tt0082000/)