Bobo the Gorilla had been at the sanctuary for a long enough time now that the employees knew him well. They were very used to his behaviour at this point, so when he began acting differently, they knew there must be an explanation for it.
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When they took a closer look, they noticed that his hand was scrunched up. He seemed to be holding something. They needed to find out what it was that he was holding, but they didn’t dare get too close. When they finally figured out what he was holding, it came as quite a surprise to the team. This behaviour was very out of character for an ape.