What television commercial would make a great feature film?

Have you heard the news about the E*Trade baby commercials becoming a feature film?

Yes, I know, very sad.

So, this got me thinking. What commercial do you think could actually become a decent movie? What would make it good? What would the plot be? Who would star? Any other details about it?

If you think it would be better off as a T.V. show, please explain.

Try to pick a popular commercial that many would know of.

Hint: serial commercials probably would work better, such as the Geico Gecko.