Deer Slips Off Zoo Ledge and Falls Into Gorilla Habitat; Surprised Gorilla Reacts With Childlike Excitement Portland, OR — Visitors at a local zoo were stunned Saturday when a young deer wandering along an upper walkway lost its footing and tumbled into the gorilla enclosure below. The unexpected fall, captured on a visitor’s cellphone, led to a surprisingly gentle and almost playful reaction from the resident gorilla. The video begins with the deer cautiously stepping along a narrow, wet ledge