It's billed as the world's only known example of a dinosaur stampede - but new research is challenging the established version of events at Lark Quarry, in the Australian outback, almost 100 million years ago.
Rewind the clocks 95 million years, and imagine the scene.
You're at the edge of a watering hole in what today is north-eastern Australia. And you're not alone.
More than 100 little dinosaurs are here, ranging from the size of chickens to ostriches.
They're drinking peacefully, when - all of a sudden - a giant meat-eating dinosaur tears out of the brush. Its teeth and claws flash as it races in for a meal.
The little guys scatter for their lives - their feet digging into the soft mud. It's a dinosaur stampede.
"This incident would have taken five minutes, if that. It's a snapshot in time," says John Taylor, a tour guide at the Dinosaur Stampede National Monument, at Lark Quarry in central Queensland.