A bone. A wire hanger. A polaroid. A big wheel. A Delorean. A lobster. A coffee mug. A bar of soap.
If these objects remind you of specific films, then that means they did their job as props. Props can be used to accomplish many things in your film, like transition smoothly from scene to scene, act as a conduit for emotional reveals, or simply mow down a bunch of adversaries — like the lawnmower in Dead Alive.
Rishi Kaneria takes a deeper look at the power of props in this video essay entitled Why Props Matter:
Not taking advantage of the storytelling potential props inherently have is like not cashing in a winning lottery ticket. You can get creative with the weapons your characters use to make your fight scenes unpredictable and exciting. You can find an unusual object that draws the audience’s eye, like John Hammond’s Amber Mosquito Cane in Jurassic Park.