1968 - At 1:20 a.m. in Mendoza, Argentina Ms. Adela Casalvieri, night nurse at the Neuropsychiatry Hospital, heard a loud penetrating humming noise outside in the hospital courtyard. Going out to see what it was, she observed a saucer-shaped landed object only 20 meters away. It was brightly luminous and sitting in the middle of the courtyard. A luminous red beam came from the object and struck her, and she found that her legs were paralyzed. Putting her hands up to her face for protection she now found she was completely unable to move. She remained immobilized for a number of minutes until the red beam was extinguished. At this time the object ascended vertically, then flew off rapidly to the south barely clearing the wall that surrounded the courtyard. Before it disappeared she was able to observe several human-looking figures through square portholes that encircled the craft. These beings moved back and forth, passing each other, and were visible from the waist up only. Landing gear imprints were found at the landing site and several small potted trees had been burned. Mrs Casalvieri had first-degree burns on her face and hands, and parts of her nurse's cap and clothing were singed. In addition, her watch, which had stopped at 1:30 a.m., was found to be radioactive, as was her ring.

(Source: David F. Webb & Ted Bloecher, HUMCAT: Catalogue of Humanoid Reports, case 1968-89, citing G. J. Gianza Paz & A. M. Baragiola).