Start with both feet together and begins by driving your left leg up into the air and explode off the ground using the right ankle (like a toe raise) keeping the right leg straight.
Instead of staying in place extend the right foot so that you land 1-2 feet in front of the starting position with the right foot landing. Place left foot on the ground in a skipping motion.
Now drive the right leg up and extend the left ankle in a skipping motion.
Repeat until desired repetitions or distance is met.