First movie to come to mind

Memories of Murder

dull pencil

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IMDb
Letterboxd

The Dark Knight (although, I don't know if the pencil was dull or sharp - it would be a better "trick" if it was dull!)


Oozing gelatinous substance

The Blob (1988)

poisoned food

The Sixth Sense


muscle rub

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The Toxic Avenger

stapler

Office Space


printer

Grave Encounters 2

lunchbox

Kindergarten Cop


electric guitar

Almost Famous

cinnamon roll

Smokin' Aces


scammer phone call

The Wolf of Wall Street

microphone

The Blues Brothers


trout

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"Film is a disease. When it infects your bloodstream it takes over as the number one hormone. It bosses the enzymes, directs the pineal gland, plays Iago to your psyche. As with heroin, the antidote to Film is more Film." - Frank Capra

A River Runs Through It

bilge

Titanic

broken glass

In the Mouth of Madness

blizzard

The Hateful Eight

trail mix