Jimmy Kimmel’s attempt to help clean up the airways with Unnecessary censorship has been running for a year and has come up with situations which were made hilarious by beeping implicit dirty words.
Spread the word: 
Digg This 
Del.icio.us
source:
Jack Black and John C. Reilly join Will Ferrell in an Oscar tribute to the comedians at the 2007 Academy Awards.
This one is an oldie, but saw it again recently. Penn and Teller use a simple scenario of lighting and putting out a cigarette to reveal the secrets of sleight of hand.
source: digg.com