When Otho (Shadix) visits the house he wears red shoes ...when he crosses the bathroom they turn white! Spooky!
Looking into the mirror, the ghosts prove that they have no reflections, but are later reflected in the attics windows.
There is a shadow in the back ground when they are supposed to be dead!!
Picture the hideous red sweater that Charles Deetz wears when trying to relax in his den. Got it? Ok.
In a later scene, Delia Deetz is wearing the sweater as PANTS when Lydia is trying to explain to her in the kitchen that she saw the ghosts.
Watch it again!