Flattening out body

Ok , just curious about this as one of my bumblebee pythons has been flattening herself quite a bit recently , Ive only seen it when she hides under her waterbowl though. Im sure there is ample room as I have larger bp's with the same water dish but they dont flatten out. Just curious if this happened to anyone or if it is a sign for anything. Thanks

Here is her flattening out. I feed her one rat pup every 5 days or so. Its kind of hard to capture this in photos

http://img43.imageshack.us/img43/5726/dsc04560y.jpg

Here is normal , this was only a couple mins later after I handled her.

http://img849.imageshack.us/img849/2118/dsc04563mb.jpg