I also agree with the reasons people are wanting to know how it happened, as if it was a case of a faulty enclosure door or something, others will want to be aware of this, but again, i am assuming it was accidental, i am guessing the door was closed on the snake........& yes, while this shouldnt happen, it IS possible to make a mistake, & if this was the mistake made, well im sure the op is feeling quite bad already!