Weird Ghost Picture

Debby Powell sent this weird picture of which we have no explanation. Ghosts or camera decide:

"My sister was running her sweeper and kept hearing some one whistling behind her. She finished the job and called me. I told her to grab her camera and this is what she got when she took the picture. She took it with a Kodak easy share camera 3.2 pix . There are some other pictures to but this is the strangest of them."