a brief rage-induced web design micro rant

so i’ve noticed this trend in many websites over the past year, including some very high-traffic sites, where you’re scrolling down the page like normal, and then after scrolling down like 870 pixels, suddenly one of the elements of the page pops into a popout window or what-have-you and automatically scrolls up the article text like 150 pixels. so your eye has no idea what happens because the words randomly travelled faster than the speed of light to an unknown location, for unknown reasons. not sure if there is a technical term for this but it’s super annoying (to the point i was motivated to write a public notice about it) and should stop being added to sites. i don’t know any where else to register this gripe into the world but i think it makes a sense to post it here given my audience of 1 web designers.