Kumbuka, the silverback gorilla
When a 400-pound gorilla gets out of his zoo enclosure, chaos is bound to ensue. That is exactly what happened in 2016 in London’s ZSL Zoo when Kumbuka escaped his enclosure, causing the zoo to go into the lockdown mode for two hours until he was tranquilized and taken back to his enclosure. However, Kumbuka didn’t actually get out of his enclosure by breaking the door or unlocking it, he just went into stealth mode when he saw the opportunity to get out due to the security failure.
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