This one is a favorite of mine, and the person behind CurioSite has been kind enough to make an English translation for everyone (who speaks English) to enjoy!
I blogged about this once already, but the theme of the commercial is that Heidi, of Swiss story fame, has been placed in a Golden Eggs series of cartoons. Golden Eggs is a popular 2000’s cartoon series here in Japan, and to me it’s a kick their mouths are always square. There’s a lot of linearity and geometry to the drawing.
As you can see on the YouTube, Heidi is going about her business there in the Alps. She decides that she will echo out her question, “What is fuel efficiency?” to the mountain valleys.
Surprisingly, the mountain responds to her.
It’s just hilarious.