A post on Metafilter linked me to The SCP Foundation a fictional catalog of creepy- strange and terrible phenomena- places and beings described in a dry scientific style. Here's the top rated entry: "Item SCP-173 is to be kept in a locked container at all times. When personnel must enter SCP-173's container- no fewer than 3 may enter at any time and the door is to be relocked behind them. At all times- two persons must maintain direct eye contact with SCP-173 until all personnel have vacated and relocked the container. Object is reported to attack by snapping the neck at the base of the skull- or by strangulation."