From The Metrix 2, by Valdamar Valerian & The Best of the Hollow Hassle:
Southern California, as well, has UFO, Sasquatch incidents and
strange underground occurrences. One of the most significant took place in April 1973. when three students camped in the San Gabriel Mountains on
the western edge of the great Mojave Desert, "felt uneasy" and suddenly saw a gigantic man-like figure that frightened the campers. The next
day, three-toed footprints measuring 18 Inches long were found in the
hard-packed soil of the area. The UFO Research Institute (UFORI) in
Redondo Beach, Calif, was called in for scientific evaluation. After
extensive field work in the campground area, UFORI discovered the sound of geared machinery and what might be compared to hydroelectric plant noise coming from 'beneath the forest floor'. While beyond normal hearing
range, the subterranean sounds were picked up by special microphone? placed
directly on the ground. Nearby the remote campground is an abandoned
silver mine which cuts through the mountain. One end has been closed by
landslides and the other end sealed off by forestry personnel to protect explorers from the dangers of cave-ins. Sounds of operating machinery have been recorded coming from within the mine AFTER MIDNIGHT. Sightings of UFOs in this area are commonplace.
