Tirunesh Dibaba is known as the Ethiopian Gazelle. Her running form is more of a sprinter than of a long distance runner. Take a close look at her running technique below, and you'll see that she's on her toes, with a long back kick and high knees.
Here's a great analysis of her running style vs. other runners around the world.
Watch her win Ethiopia's first gold medal in the 2013 World Championships. A very exciting race as she kicks it up a notch.