The 16th Street Mall is perfect for people-watching and eavesdropping. All manner of freaks can be found on the mall -- from the suited to the suit-less -- but the most amusing to watch is the Bitter Biker. The anonymous cyclist rides up and down the mall yelling, "You are all sinners!" and other such Puritan dogma. Sometimes he even throws in a "I am not here to kiss your babies!" On special occasions, he ditches the bike and does his rounds on foot, strumming his guitar and opining -- in key. It may not be music to the ears, but it sure makes the "Hillary is Hitler" guy at Colfax and Lincoln seem a little on the unimaginative side.