It's proper eerie at times, especially the end. Where it really excels, though, is as one of the few successful depictions (it is not necessarily an unqualified celebration) of the swaggering macho of (a lot of) the kind of men who do things or discover things or drive others to do so, which the under-30s will find more horrific than the ghost, and the larky camaraderie of a good joint enterprise.