It's really a pyrotechnic marvel. I remember the first time I saw one. It was around six years ago, when a bunch of us went to Fisherman's Wharf to watch the 4th of July fireworks display over the San Francisco Bay. I was completely floored. How do you form a perfectly shaped smiley face - with the dotted eyes, smile and everything to be all proportional to each other - by chucking a canister hundreds of feet into the sky and blowing it up!
Whenever I watch a parade of fireworks now, the smileys are the ones I wait for. Because a fireworks show isn't really complete without a few gigantic, oddly-oriented smiley faces in the sky, smiling at you and you smiling back.
But the upside-down ones make me laugh.
(taken last year during the Macy's fireworks show in New York)