Another fun use of an extraction is as a patterned background. For this image I made an extraction of each pumpkin. On a layer above the background layer I placed the two pumpkins, duplicated the layer, moved the top layer into a different position that I liked, merged that layer with the original extraction layer, and kept repeating until I had a the background. For other methods of creating patterns, check out
Creating Textures, Patterns, Seamless Tiles, and Backgrounds.