21 Amazing Psychedelic Horror Films

Blue Sunshine (1978)
Alamo Draft House

We've all heard urban legends about acid flashbacks, and "Blue Sunshine" taps right into those fears. The film takes place a decade after the Summer of Love and the flower children have all grown up and moved on. They've become husbands, mothers, professionals and politicians -- but then a bizarre strain of LSD called "Blue Sunshine" begins to rear its ugly head again. The symptoms pop up a decade after initial consumption: sudden baldness, intense homicidal mania, the ultimate bad trip.

Directed by Jeff Lieberman of "Squirm" fame, "Blue Sunshine" taps into a familiar anxiety among psychotropic psychonauts: Has this substance harmed my mind as well as expanded it? Will I pay for it down the road? The film doesn't pack much in the way of psychedelic imagery, but in a way that works to its advantage. It's not about the exploding skies of yesteryear but the dry reality of here-and-now. The terror holds up well, as does the lead performance by the late Zalman King, better known for his work as an erotic film director.

About the Author: Robert Lamb spent his childhood reading books and staring into the woods — first in Newfoundland, Canada and then in rural Tennessee. There was also a long stretch in which he was terrified of alien abduction. He earned a degree in creative writing. He taught high school and then attended journalism school. He wrote for the smallest of small-town newspapers before finally becoming a full-time science writer and podcaster. He’s currently a senior writer at HowStuffWorks and has co-hosted the science podcast Stuff to Blow Your Mind since its inception in 2010. In his spare time, he enjoys traveling with his wife Bonnie, discussing dinosaurs with his son Bastian and crafting the occasional work of fiction.