Yesterday was No Pants Day 2008, the 7th Annual Improv Everywhere event that includes hundreds of people riding the subway with no pants on. According to IE's initial report, yesterday's event drew 900 participants, requiring that the group split up onto three different lines--the 6, the R, and the 2 trains, which they rode from downtown Manhattan to Union Square. Or as someone noted on Gothamist Contribute, "Those retarded pantless freaks boarded a downtown......