Because I think psychedelia can totally be monochromatic. And so does Alan. I mean why should achromats be excluded?
These were actually originally shot on color film (yes, expired) but the scans came out mostly crap so I converted them to black and white in Silver Efex Pro.
All but the first are double (or triple) exposures with Lensbaby optics (the double glass, I think) on a Minolta Maxxum 5.