April fool's day?

Watch the following video and visit the links below to know more...

http://en.wikipedia.org/wiki/April_Fools%27_Day (Some history, from Wikipedia)

http://www.isabelperez.com/aprilfoolsday.htm (theory and some practice to undertand it better)

http://www.museumofhoaxes.com/hoax/aprilfool/ (100 best hoaxes)