BTW, the specific video I’m talking about is the one at 25 seconds into that much longer video. I didn’t bother to watch the rest of it.
https://youtu.be/hUx6gHw3McM?t=25
You want a real world example of something like this?
Hold your right thumb up straight out in front of you at arms length and close your left eye. Look at your thumb. Without changing the direction that you are looking, slowly move your arm/thumb to the right. When you move your thumb about 6-8 inches it disappears, and then reappears when you move it a little farther. That’s more of a biological phenomenon than an optical one, but it’s a simple example of how the specific complexities in a given system do things like that.
Have you ever wondered why UFO and Sasquatch videos are blurry? Yeah, neither have I.
Yeah, well, if I kill myself trying to work out this “ thumb and left eye closed” thing while running the brush hog, it’s your fault.