Do you know the story behind Mind Yeti?

The Montauk Project finally came to end on August 12, 1983.

On this date, a time portal was opened that connected Montauk Base with the USS Eldridge of 40 years ago, during the original Philadelphia Experiment. While this portal was being opened and maintained, several members of the project, who had become increasingly uncomfortable with the aims and designs of the project heads (and with the effect that warping time and space might have on the world around them) decided to bring the project to a crashing halt.

A code phrase was whispered to Duncan, at which point he released a monster from his subconscious. This creature, or 'Beast from the Id' materialized as a large hairy monster (below image) that smashed its way about the base, destroying and eating everything it could find. Meanwhile, one of the project members began cutting apart cables and conduits in an attempt to sever the power to the base transmitters and shut down the project.

After smashing up and cutting apart enough equipment, the transmitter powered down and the Beast

mercifully faded away. This Beast is the Mind Yeti