mary go round

she goes round turning round and round forming a whole circule of 360 degrees,
mary can see all of what is by her side but she can't see her front neighbour's face and she also can't see her back neighbour because if she does want to see him she will have to go around herself, and that's pretty difficult to do.
how does mary can go round herself? and how does her front neighbour can go round himself so he can see mary's face? (i think that mary must be pretty)
so mary wont never be able to go round because her eyes are glued in front of her face and her neck does not go round 360 degrees and her spine is hard and does not allow her to bend over.
i think that mary would love to be a snake...