This one has become my all-time favorite:

http://comics.com/pearls_before_swine/2009-12-06/

Here's one I just heard on the radio: Not everyone knows that William Tell and his son were excellent bowlers. They used to participate in bowling marathons for various charities, however, they often disagreed with each other as to which charity to support. Thus, the old expression: You don't know for whom the Tell bowls.