Indeed, the human ability to see faces in things crops up all the time.
There's a pretty good article here: Seeing Faces The Situationist
Which includes this rather interesting quote:
“There is an universal tendency among mankind to conceive all beings like themselves, and to transfer to every object, those qualities, with which they are familiarly acquainted, and of which they are intimately conscious. We find human faces in the moon, armies in the clouds; and by a natural propensity, if not corrected by experience and reflection, ascribe malice or good- will to every thing, that hurts or pleases us.” - David Hume, 1757
See also: Pareidolia.
Pareidolia - Wikipedia, the free encyclopedia
Great picture though.