The editorial team of alcorconhoy received an unusual alert one Wednesday morning, during peak hours, concerning an incident on the Line 12 of the Alcorcón subway. The MetroSur security chief for the town contacted the newsroom with a voice filled with dread to report an anomalous situation that was neither a breakdown nor a forgotten item.
A technician identified as José Luis went to the Puerta del Sur interchange the following day, equipped with recording devices. He was met by a visibly distressed operator whose eyes reflected an expression of shock. The technician stated he had been unable to sleep for three nights due to what was happening in the tunnel, specifically between the fourth and fifth signal lights towards Parque Lisboa.
Both descended to the tracks, where the atmosphere became oppressive. The air was heavy with the smell of dampness, rust, and a faint hint of rotten eggs. As they walked, the technician whispered, asking José Luis to listen. Initially, only the usual metro noise was audible, but soon a different sound emerged: a rhythmic, dry, and harsh scraping, coming from the tunnel wall.
Upon approaching, José Luis observed through his mobile phone camera a human silhouette with grayish skin. The figure held a piece of chalk and was feverishly writing on the concrete wall. When José Luis asked who it was, the creature stopped, fixing its bright green eyes on the writer. With a twisted grimace revealing rows of tiny teeth, the being pointed to a freshly written phrase on the wall: 'Finally, someone has come to listen'.
The situation escalated with the appearance of sharp blows and hysterical laughter echoing from the tunnel's depths, accompanied by sounds of screams and rapid breathing without any apparent physical body. The technician, visibly stunned, urged José Luis to leave the location immediately.
Before making a hasty retreat, José Luis recorded a final shot. Upon reviewing the audio recording later, he clearly heard the phrase: 'You're going to die, asshole.' Upon meeting with the director, he was told that during the metro's construction, a gang-related murder had occurred in that very tunnel.
The next day, José Luis wrote his newspaper column, adding a cautionary note for MetroSur passengers: 'If the train ever stops in the middle of the tunnel without explanation, do not look out the window; they are performing welding work, and it is dangerous for your vision'.
