One for the "Things That Make You Go Hmmm" File:
"What would you say, given one free minute of anonymous public speech? One Free Minute is a mobile sculpture designed to allow for instances of anonymous public speech. When you call the cellphone inside One Free Minute, you get connected for exactly a minute to a 200 watt amplifier and speaker. The speech produced by the speaker can be heard clearly more than 150 feet away from the sculpture. "