I have had one grab the tail and wrap it before, it was so silly. She ended up eating it from the head that particular time though.
I have a few girls that are notoriously eating backwards and it drives me crazy. Takes them so much longer.
My hognose LOVES eating them sideways!! It takes her absolutely forever to eat. I try to hang on to the butt of the mouse while she swallows to get her to properly orient it, but almost always it fails and she eats it from the middle, folded in half.