Sora no Otoshimono.
The most commonly discussed aspect of the show seems to have been its flying pantie ending. In which, flying panties fly in patterns similar to flying birds.
That said, to celebrate the release of the DVD, one Japanese retailer (Sofmap in Akihabara Amusement kan) has erected this real life display.
(Via Canned Dogs)
Other Sora no Otoshimono content to check out:
First Date Review
The Flying Panties ED
Real Life Recreation of the ED