Auntie Breeze has this odd habit when we are out. As you can see in this photo she runs out and then drops down to the ground when waiting for the tennis ball to be thrown.
You can see her a bit better in this picture.
Its something Border Collies do instinctively and its not trained into them. Its for when they herd sheep.
Its not something us English Shepherds would do. Plus that grass looks far to damp!