16. Monster-In-A-Box Prank
Add an element of surprise to your porch decorations with a classic “Monster-in-a-Box.” Place a rustic wooden crate on your porch, and install a small motor or pneumatic piston inside to make the lid rattle violently at random intervals. Combine the movement with green light escaping from the cracks and a hidden speaker playing growling and scratching noises. A reaction video compilation of trick-or-treaters jumping in surprise as they approach the box is highly engaging, shareable, and perfect for viral social media platforms.