Who would be insane enough to risk hypothermia in the 53 degree waters of the Bay? You can see a thousand of these nutcases at noon this Saturday during the 2017 Polar Plunge at Aquatic Park in the City. If you are deranged enough to join in the fee is $100. Anyone who changes their mind at the last minute and turns back are sent to the “Chicken Coop” to be heartlessly mocked. It’s a benefit for Special Olympics of Northern California. Free to gape at the madness.