Use Humor to add Tension

Dialogue Means Nothing - Use facial expressions, have one character not listening to another, dialogue can be a lie.

Keep the story simple: linear and streamlined, story simple but characters complex

Characters Must Break Cliche: List breaks into apartment (unlikely) Thorvald respectable murderer

Use humor to add tension: Stella is talking about blood being splattered on walls, bacon is being eaten with blood dripping off it.

Two things happening at once:  Two things happening to distract viewers
different things going on in the windows

Suspense is information: dog returning to garden

Surprise and Twist: son is mom in pshyco, rear windwo has moments where thorvald doesn't seem to be murdrer

Warning may cause MacGuffin: Drives story forward ! the thing everybody wants psycho -$40,000