Fun facts about Spaceballs.
The movie was originaly titled planet moron but it could not be used under copywrite laws so brooks and his casting director tried to think of another name. Brooks told him to try and think of something with space in it. Then he droped something and said "Balls". His Director said," That's it. Spaceballs.
The scene in which dark helmet was playing with spaceballs dolls was improvised by Moranis.
The film heavily parodies star wars so much that it had to have permission from george lucas to make. He agreed with one condition. There could be no merchandising. That's why merchandising was such a big bit in spaceballs the movie.