24_hours_viral_reel_ on Instagram: "A simple setup with sound and water creates an effect where flowing water seems frozen, moves backward, or flows in slow motion. The effect is only visible through a 24 fps camera, not to the naked eye. The setup needs a powered speaker, a water source, a soft rubber hose, tape, tone generating software, and a camera set to 24 fps. The hose is placed against the speaker so it vibrates with the sound. When the tone generator is set to 24 Hz and water flows thro