  The B\"o\"ogg is a large model of a snowman, constructed of inflammable
materials and filled with explosives. During the traditional festival of
Sechsel\"auten, which takes place each spring in Zurich, Switzerland, the
B\"o\"ogg is placed atop a wooden pyre, which is set alight. According to
popular legend, the time that elapses until the B\"o\"ogg's head explodes (the
"head-bang" time) is said to give a rough forecast of local weather conditions
prevailing during the following summer. However, recent research has questioned
the validity of this prediction. To study the B\"o\"ogg's predictive powers, we
analyzed the B\"o\"ogg head-bang time record from 1965-2010 within the context
of global climate change. Our analysis shows that the B\"o\"ogg head-bang time
is a good predictor not of short-term local weather, as might be expected from
the legend, but of the behavior of the entire global climate system.
