The BFG by Roald Dahl

Then Sophie saw them. In the light of the moon, she saw all nine of those half-naked brutes thundering across the landscape together. They were galloping in a pack, their necks craned forward, their arms bent at the elbows, and worst of all, their stomachs bulging. The strides they took were incredible. Their speed was unbelievable. their feet pounded and thundered on the ground and left a great sheet of dust behind them. But in ten seconds they were gone.