Don't know how to cite or steer you to the ad, but, perhaps depending Google has pegged in cookies, you might see it if you refresh the page a few times.
I sent feedback to Google on it. (In part: "I bet Capital One has a helluva lot of fat customers. But now it has one less than it did before.")
This kinda crap, along with the before/after and miracle surgery ads, makes me feel assaulted by my computer monitor. Which is usually my friend, you know?