Underdog Cheerios Commercial

Remember the cartoon hero Underdog?

The opening dialog sounded like this.

Crowd, "Look, up in the sky, it's a bird, it's a plane, it's a frog...a frog?"

Underdog, "Not bird, nor plane, nor even frog, it's just little 'ole me, Underdog!"

What is most interesting is the fact that Underdog was created as an avenue for General Mills to sell cereal. Here is a commercial from the early days of taped TV commercials.