My favorite non-Sportscenter commercial of all-time has to be the old commerical for Bush's Baked Beans.
It's basically the creator of Bush's Baked Beans talking about how he created a secret recipe for his beans, and "I've only told one other soul and he's not telling."
Then they cut to the dog who says, "Roll that beautiful bean footage."
It doesn't sound funny at all, but it''s great. Something about a dog talking about rolling about some footage of a bean recipe. Great hilarity.