Ghost Pictures: Ghost Light

Tiffany Harter sent this ghost picture of a streak of light - is it a ghost?

"My friend and I were coming back from a party on July 16, and I wanted to take some pics for MySpace. So I took out my camera phone and took about 5 different ones. We used the same lighting and setting in all of them. When I got home and was uploading them and making them lighter because they were dark, I noticed in the last one I took a white streak. This streak isn't in any others and hasn't shown up in any pics before or after it. Who knows...could be nothing. I am hoping though it's someone we love...thank you for your time!"