Here's a twist. Usually, I present the trailer first, then the full film it represents. But I can't find the full film for Roger Corman's Amazons trailer (1986) above. And I can't find the trailer for the feature length Queen of the Amazons (1947) below. So you get the trailer for one, and then the full other feature. But they are both so bad, you probably wouldn't have noticed if I didn't mention it, despite a 40-year gap and one being in color and one in B&W!!
An absolutely terrifying acid trip with two BIC lighters -- at the drive-in, starting out with Peter Max/ Yellow Submarine type animation. Combined with stop-action and claymation, it makes me glad I was only a kid in the '60's and have suffered no lasting effects.