Hi, all! i just came across this by accident and thought it might interest some plugin author enough to write a similar feature for jQuery:
http://imdb.com/title/tt0084787/faq scroll way down, or search for "Are there any deleted scenes for this movie?", and look for the red text which says "Spoilers!". It is an effect which hides certain text until you mouse over it, at which point the real text is revealed. The intention is to keep people from accidentally seeing text which might spoil a film for them (i.e. reveal more information than they might want to know before seeing the film).