A sign that says "Take One"

A jack o lantern mask that leaves the player's eyes/mouth spot open (using their head graphics like a hollow pumpkin)

A hand (Think "thing" from addams family)

A half-headed zombie mask (mask itself is only covers one side, including exposed brain, skull, eye socket)

Cthulu

Bubbling cauldron

This http://o.aolcdn.com/hss/storage/midas/1306ef00a5848310f15e9d7a00fbcc25/202968693/mexico_skulls.jpg (Unsupported image host)