What exactly is a flying stick?

It has been found out that the flying stick is caused by the tailing of flying insect images caused by the refresh frequency of the camera and has nothing to do with UFOs. If you are interested, you can use a home DV to shoot in the grass at night (of course there must be a lot of flying insects) (lights are needed), and play it back, and you will find a lot of "flying sticks". Finished answering.