Race Car Ghost Picture!

We were sent this e-mail and a first...race car ghost picture - don't know what caused the orb:

"My name is Melanie Periard and I live in Cornwall, Ontario, Canada. This picture was taken May 15, 2005 at the Cornwall Motor Speedway. It was taken at around 7 o'clock. I'm not sure how hot it was outside. For all I know, this could be dust, but dust has never shown up in any other pictures before.

The picture is enhanced, but only the brightness was touched. It's on my website. If you want to see the picture on the site, go to www.geocities.com/racing_fan16/home.html"