Rick Potts and Joseph Hammer met at a Halloween party in 1982. At the time, Joseph was making tape loops and recording with Points of Friction, while Rick already had many years of freakdom service under his belt with the LAFMS. They began collaborating on new recordings, with Joseph providing loops and Rick playing an Optigan borrowed from Joseph. The Optigan, made by a toy manufacturer for home use, is a primitive 1970s sampler that plays prerecorded discs ranging from exotica, pipe organ and circus band to country, folk and cheesy rock combo. The resulting prepackaged loops have a wholesome lo-fi easy listening vibe, but can be manipulated by misuse, transforming them into something far stranger.

Throughout most of 1983, the pair recorded regularly in Rick’s cramped living room using a reel-to-reel four track tape deck. Joseph developed a stereo tape-delay ping-pong feedback effect he dubbed "Hammer-Imaging", while Rick played keyboard parts to the Optigan's vintage beats. Joseph also created some dreamy electronic solo pieces using Casios and toy synthesizers, and recorded tape loops on a custom inverted machine, over which Rick added musical saw and other instruments. Visiting friends sat in sometimes. Instead of song lyrics, they chose to use found sounds from thrift store cassettes and LPs that fit the music. The recordings were assembled on cassette in the winter of 1983, initially to give to friends over the holidays. Soon after, they received an official release via Fredrik Nilsen's newly founded The Solid Eye Records and Tapes label.

The music has a woozy magic that combines musical qualities with discombobulated weirdness. Spontaneous synchronicities emerge as plunderphonic vinyl meets loops and Optigan rhythms. Dinosaurs with Horns crawled out of this surreal swamp, galumphing into the hazy LA smog, and have been bombastically wandering since 1984.

This first time CD reissue features Rick's art from the original cassette, along with photos of the sessions in a full-colour eight-page booklet.