In this joke ad for the Smart Car, Fredo delivers his
classic line from The Godfather: Part II,
with some added dialog, saying: “I’m smart! That’s why I bought a Smart Car!”
(Then he goes for a ride with Michael’s hit man in his Smart Car, showing it
off to demonstrate how smart he is, and he gets whacked.)
Here’s a clip from the movie where Fredo delivers the
famously awkward line (It’s at about 0:09):