Weird photographic effect — can you explain it?

Charles says:

Img00005(Click on thumbnail for enlargement) Long time boingboing reader, first time emailer.

I thought I'd solicit the help of the boing boing community in explaining a weird optical illusion in a photo I took.

I was travelling in a Bombardier turboprop plane recently, looked out my window and saw the propeller. Thought it would make a nice picture, so I took out my cameraphone.

The picture is attached. Unphotoshopped. There are propeller blades that appear to be floating, and that appear in a path that is outside the normal path of the propeller. Not sure what to make of it.

I've got a few other photos showing the same thing, but I'm enclosing the most dramatic one. Can anyone explain what's going on?

Link (Please don't email me about this. Post your explanation here.)