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As he reached out, a sudden wave of pain spread through his chest.
Within seconds, he collapsed onto the ground.
At first, the gorilla appeared confused.
No response.
He nudged him again.
Then something remarkable happened.
Witnesses later said the gorilla looked repeatedly toward the building before releasing an incredibly loud series of calls that echoed throughout the sanctuary.
Employees stopped what they were doing immediately.
Several rushed toward the enclosure.
Rather than interfering, the animal stepped back as staff unlocked the emergency access point.
It was almost as though he understood they were there to help.
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