This event was pre- planned a while ago, and the entry fee was about $22 US which included a pair of flying panties;

The Gigazine website has posted a report with photographs and videos from Saturday’s Sora Fes! — a festival for homemade model aircraft, including many inspired by the flying panties seen in the Sora no Otoshimono television anime series. In addition to the 160 paying attendees, Sora no Otoshimono anime director Hisashi Saito, Award-winning science-fiction author Housuke Nojiri (Rocket Girls, Usurper of the Sun), Kazuhiko Hachiya (the artist best known for developing OpenSky’s life-size jet-assisted glider inspired by Nausicaä of the Valley of Wind), and TBS television announcer Jun Suzuki appeared at the event. During the event’s final session, over 100 rubber-band-powered flying-panties models were launched simultaneously.

The flying panties are pretty good at keeping air, so its not just their unique looks that make them worth while.

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