Shock (1946)

A woman witnesses murder and suffers such a shock, she is admitted to a psychiatric facility in a catatonic state and of course the doctor-in-charge turns out to be Vincent Price's Dr Richard Cross, the murderer, but luckily for our catatonic patient, the dastardly doctor dispenses with the hefty candlestick he used on his wife's head (beside an open apartment window) and in the hospital decides  far more cautious methods are needed to overcome obstacles to his securing a wife-free future: he does things like rap on the beside table rhythmically as he whispers in the woman's ear, trying to confuse her. 

★★☆☆☆

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