I don't know if anyone else has mentioned this one, but, it's for the Discovery channel. Their slogan is something like "know more than you should." There's one that starts out with a lady and a man in an upper office window, drinking coffee. They look outside and this lady drops her umbrella (I think that's the first link in the chain of events). The lady in the office building says to the guy "Great, now there'll be cats everywhere." And, through a chain of events (including a really cute squirrel panting after a near death experience), a milk truck dumps its contents everywhere and cats come out of the woodwork. The office lady turns to the office guy and says "I like your shirt." I am probably the only one that thinks it's funny, but, I love it.