All Kidding Aside: Did Curiosity See Something Go Bump In The Night?

The Los Angeles Times is reporting that in the first photo Curiosity took of the Martian landscape there was a blurry image of something on the horizon.  Two hours later, when Curiosity took another photo of the same landscape the blurry object had disappeared.

What was it?

Theories abound, but no one is saying what the image was for sure.

Read the story here.