Mad River is the brand of one of the leading canoe manufacturers.
The Havel - one of the two rivers flowing through Germany's capital Berlin - is in some respects a mad river, too:
After a length of 325 kilometers the Havel ends in only 69 kilometers distance to its well-spring by opening out into the Elbe river.
In 2004 the Havel was elected as Germany's River of the Year.