Perfectly calm, the gorilla lays the unconscious bundle in front of the door. When she gets up, touching scenes play out.

Binti-Jua, a rare western lowland gorilla, immediately arrived at the scene. She lumbered over the boy and gently picked him up, cradling him in her arms. Lovingly, she took care of the helpless boy and protected him from the other gorillas, while the passers-by watched on disbelievingly. Binti-Jua carefully carried the boy to the front door of the enclosure, where she gently laid him down at the feet of the waiting the paramedics.

It was a truly incredible scene that will forever remain in the zoo patrons’ memories. “She picked up the boy, kind of cradling him, and walked him around,” said Sondra Catzen, a zoo spokeswoman.