Do you remember this story? Thirty years ago two Australian men rescued a lion cub from a department store, reared it for a year, and then realized they could not continue doing so and that it would need to be reintroduced into the wild. The reintroduction was successful. A year later, the men returned for a reunion with the lion, which they had named Christian. Here's a 2-minute video of that reunion. Watch and be amazed.
You can read even more about this remarkable story here.