is when you're on a webpage , but you have to scroll down a bit to get to the link you want
and once you get to that link and place your cursor over that link , and just as you're about to click on that link
the page just automatically , randomly jumps !!! , jumps up or down about a half an inch , but by now you're in mid click , you're committed
and you end up clicking on some random add a half inch above or a half in below , whatever it was you originally wanted to click on in the first place