Putting the milk back in the fridge when we're done is a practice our parents beat into our heads from birth, and by the time we're grown up and buying our own milk we never forget to put it back.
So when we as full grown adults actually manage to leave the milk out without remembering that we even used the milk, much less left it out, the glaring error makes us feel like we're losing our minds.
But, as this Channelate comic by Ryan Hudson shows, that carton of milk may have left itself out- with a little help from mischievous house ghosts. Sounds legit to me!
-Via Geeks Are Sexy