The earlier posting about feeding the bears reminds me of a incident I saw at Chester Zoo many years ago.
The Lion enclosure is seperated from the roadway by a six foot wide flower bed, beyond which is a wide concrete wall with mtal posts and a high mesh fence in the middle.
Someone lifted a five year old girl across the flower bed and onto the wall where she poked her arm through the wire to attract the attention of the lions! Oh boy!
A lioness came across the compound like an express train. Fortunately, a woman with slightly more sense than the parents screamed, and someone snatched the child away just as the lion hit the wire. Mother then had hysterics!

FC