In the middle of the video, someone wearing a gorilla suit unexpectedly walks through the scene.
While the ball was being tossed, someone in a gorilla suit walked between them in plain view.
They look like the feet part of a gorilla costume, and they feel almost like being barefoot.
And when later told to look for a gorilla, nearly everyone found it.
It sounds dangerous that these expert radiologists might fail to spot something as obvious as a gorilla in your lung scan.
And the cost of that is that they're subject to missing other things, even really obvious large things like a gorilla.
In one of the scans, the scientists inserted an image of a gorilla almost 50 times the size of a nodule.
Samsonite is a venerable brand, but its last memorable advertisements--back when air travel was special--showed a gorilla jumping on its sturdy suitcases.
Just as an elephant is, roughly speaking, a larger but more energy-efficient version of a gorilla, big cities are thrifty versions of small ones.
"Babies have a calming effect on a gorilla community, " he said.
Before that it was nearly a decade since a gorilla was born at Durrell, as Hlala Kahilli was the last gorilla to give birth in 2003.
Of all the phones I've seen, the Lumia 900 is the one that feels the most solid and hardwearing (having a gorilla glass screen always helps).
Fans of Dr Doolittle will be heartened to hear of Koko, a gorilla whose knowledge of more than 500 signs allows her a fair line in jokes.
The zoo veterinarian explained that a gorilla's heart is similar to a human heart, and that the zoo badly needed a human cardiologist to help complete their care.
"After losing to the spinosaurus in Jurassic Park III and now to a gorilla, it would seem that T. rex has lost most of it's 'rexness, '" says Horner.
He's not as smart as a gorilla, but he's a finely tuned predator, and heavily armed with 60 huge, sharp teeth as well as massive claws on his feet and hands.
"Whatever a gorilla mom would do with her baby is what we have to do with this baby, " said Ron Evans, the zoo's primate team leader and one of Gladys' human surrogates.
Later, they will don hairy vests and carry baby Gladys on their backs, put on kneepads and gloves to move around like a gorilla, and they might knuckle-walk and climb a tree with baby on board.
"You're not putting two gorillas in a cage, you're putting a gorilla in with a mouse, " says Marick Masters, a professor at the Katz Business School at the University of Pittsburgh who specializes in the airline industry.
Enter Leikr: a Gorilla Glass beast with a 2-inch, 320 x 240 display that can throw out a wide range of endurance stats simultaneously or switch to a color navigation mode using up to 8GB-worth of onboard OpenStreetMap data.
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When asked afterwards if they had seen a gorilla, more than 80% of radiologists and 100% of unskilled observers, said they had seen nothing - this despite the fact that the eye-tracking monitor showed that half the radiologists who did not see the gorilla had actually looked right at it for about half a second.
So what is it like seeing a wild gorilla only a few metres away?
To be clear, when we talk about that white lid, we're referring to the 13-inch model, specifically: that bigger version has a white Gorilla Glass cover, while the 11-incher has a metal lid.
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But despite the support of computer makers groaning under Intel's dominance, trying to hitch a ride on the back of a grumpy 800lb gorilla was proving a precarious form of existence.
Then, for the briefest moment, a mother gorilla opens her arms, revealing her tiny baby.
There's a new Gorilla Glass-equipped 3-inch, 920k-dot display, that's plenty sharp and quite responsive in live-view mode.
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If we could really set a T. rex and a giant gorilla against each other, who would win?
Jambo, a silverback gorilla, became famous when he protected Levan Merrett from other gorillas when the boy fell into the enclosure in 1986.
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