That things disappear on a Halloween site is to be expected. If you could lose socks here or have floating books, it would happen. That said, that is such a fun prop. I love it when people put props together in unusual ways, and this one hits all the right buttons. Are you going to age it, or is he one of the pristine lucky ones?
Reminds me of a deadite from army of darkness! Looks great, what did you use for the chain mail on the torso? Also, the bigger question, what is that foam monstrosity with PVC structure sitting on the floor behind it!