You are in the forests of China, 75 million years ago.

You push through the dense, prehistoric ferns of the Late Cretaceous period in what is now modern-day Shandong. Suddenly, the foliage parts and a deep, resonant bellow is heard. Before you stands an absolute colossus: a Shantungosaurus.

It is the largest duck-billed dinosaur (hadrosaur) ever discovered, stretching roughly 16.5 meters long and weighing over 17 tonnes. It grazes casually on cycads, its massive weight causing the ground to shake. What do you do?