a skeletons bones would rattle right? a banshee would scream. DH is convinced that spiders make a evil clicking sound, but thats more his phobia than a haloween thing. the BLOB would make a blobby squelchy sound I guess. a Mummy would make a cloth dragging type of sound. Erm a Dragon roaring? erm ok i'm out i haven't a clue what else. oh how about a raven cawing or a frog ? good luck and happy halloween