I still remember when i first heard the word "laser printer" which gave me a chill. I still remember the first time i ever saw one popping out printout pages like popcorn. But i really do not remember how many years passed since i managed to find out how they work. Here is a video, explaining the basic operation of a laser printer. The video is impressive, but it lacks of the details. Worth to watch if you don't know how it works.