In 1974, in the wake of a dramatic UFO flap which included cattle mutilations, strange creatures and Marian apparitions, an hour-long documentary aired on Puerto Rican television recounting highlights of the incredible events. One of the documentary's segments involved the curious story of a a group of young people who had found themselves besieged by thoroughly bizarre creatures during a visit to the rainforest.
On the night of October 20 1973, nine campers--students led by three adults--had gone to El Yunque hoping to "contact" UFOs and their occupants. They made camp high up on a mountain trail, preparing to spend a night that would turn out to be the longest in their lives.
Mr. Heriberto Ramos, the group's official leader, stated that at one point during their ascent along the trail, they met three persons heading downward. There was nothing "alien" about the trio aside from the fact that they all dressed exactly alike and with similar features. One of the group members, who had stayed behind, took a photo of both the other group members and the three mysterious walkers, but only a patch of mist appeared on the developed film where the trio stood.
At a given moment that night, thoroughly convinced that an otherwise uneventful vigil lay ahead, the campers were surrounded by five or six vaguely humanoid figures which darted about the thick vegetation with claw-like hands and elongated ears. Some of the "monsters" blocked the precipice-flanked trail that constituted the only way down from the mountain and back to the safety of their vehicles.
From a prudent distance, one of the creatures regarded Ramos intently. Upon noticing this, the latter tried walking cautiously toward the eldritch being, hoping to show that his group's intentions were amicable. Ramos stood less than ten feet away from the creature, and was able to describe it as having a triangular head, and "extraordinary" eyes. Amazingly, he managed to touch the strange being, which did not stir. Its skin felt neither cold nor rubbery. Almost simultaneously, one of the students lit a large, powerful flashlight in the direction where the contact was taking place, flooding the area with light.
The clawed creature reacted by racing away from the scene, literally tearing a path right through the dense vegetation, which led to a 100 foot drop, giving the startled Ramos reason to think he had frightened the being into jumping. To the man's amazement, it reappeared instantly at the side of its fellows, which were still blocking the downward path.
For endless hours until the sky began to lighten, the beseiged campers were surrounded by the beings, who remained in constant motion around them. Terror had led one of the students to bang himself repeatedly on the head with a flashlight, hoping to escape the situation by passing out. Seized by an inexplicable urge, another camper expressed a desire to take a walk in the woods. Fearing for his mental state, one of his companions offered to walk with him. Before they'd taken more than a dozen steps, they found what could only be described as a glimmering, polychromatic "egg" lying on the ground. While entranced by the curious flashing object, neither one felt brave enough to touch it. Later that night, they would see it in the claws of one of the nonhuman besiegers. Was it "bait" of some sort, its pulsating colors designed to mesmerize prey?
At sunrise, the campers made a mad dash for the cars they'd left parked at the bottom of the mountain. Not a trace of the alien intruders remained aside from their footprints, which were much larger than a human's and appeared to have been made by very heavy creatures, in comparison to the smaller footprints left by the humans. Their valor rekindled by the morning light, the campers made plaster-of-paris casts of the prints and photographed them. These materials were stolen by unknown parties months after the incident, including valuable infrared prints.
http://www.ufoarea.com/puerto_hell_night.html