There's actually very little in the debut issue of Brain Fantasy #1 that could not have been published in a mainstream comic book. There are four featured stories, and I particularly like the last one by David Parker and Rick Shubb, "Where Do We Go From Here?" The front cover art is pretty cool, though I would've preferred a more gruesome character than the gloopy dude on center stage here. Or maybe some hot damsel-in-distress chick with her clothes melting off.
Brain Fantasy #1
Publication Date: May, 1972
Publisher: Last Gasp Eco-Funnies
Pages: 36
Authors: Rick Shubb, George Metzger, Robert Inwood, David Parker