From the Milwaukee Journal Sentinel:

First, a warning: The extreme sport we are about to describe should not be attempted at home. Alcoholic beverages are to be avoided at all costs. Ambulance crews should be available just in case. A pontoon boat with a winch might come in handy, too.

We're talking snowmobiles on water.

The 33rd annual World Championship Snowmobile Watercross event, which concludes Sunday, is a three-day festival of machinery, speed and noise.