And, like a dutiful son, covered up all traces of the crime he was convinced his mother had committed!
8 seconds sound clip from the Psycho (1960) movie soundboard.
You can hear this line at 01:45:59 in the Blu-ray version of the movie.
Quote context
[...]
- And because he was so pathologically jealous of her, he assumed that she was as jealous of him.
- Therefore, if he felt a strong attraction to any other woman, the mother side of him would go wild.
- When he met your sister, he was touched by her, aroused by her. He wanted her.
- That set off the jealous mother, and Mother killed the girl.
- After the murder, Norman returned as if from a deep sleep...
- Why was he dressed like that?
[...]