The 2009 NY Anime Festival (NYAF) climax for many attendees is the Yume Cosplay Masquerade Contest. Participants compete for prizes, the grand prize being a trip to Japan. Twitter just wanted to see the photos.
Dressed in costumes of their favorite Anime, Manga and video game characters cosplay performers act in skits, dance routines and perform comedy bits around their character.

Flicker and other photo sharing services were sent a barage of  photos of cosplay (costume play) performers only to be re-tweeted or re-posted on Twitter. From the Twitter stream (@ indicates who the tweet is from or to):@RockLoveJewelry "Was stopped for a ton of photos at NY Anime Fest - and interviewed for the steampunk documentary. Great evening with that krew! Thanks guys!"