ELI5: Explain Like I'm 5

Rope trick effect

Let's imagine you have a piece of rope that's hanging down from the ceiling. Now, when you pull and shake the rope, it looks like it's alive and moving on its own! This is called "rope trick effect."

It happens because our brains automatically try to make sense of what we see. When we see something move, our brain assumes there must be a cause for that movement. In the case of the rope trick effect, our brain assumes there must be something making the rope move – even if we can't see it.

So, when you shake the rope, your brain tries to figure out what's causing the movement. It's like your brain is saying, "Okay, something must be moving that rope… but what is it?" And since there's nothing visible to explain the movement, it can create a feeling of confusion or even a bit of fear.

But of course, in reality, there's nothing mysterious happening. It's just a simple rope that's being shaken! So, there's no need to be scared or confused – it's just an optical illusion that our brain creates.