Originally Posted by wikipedia

Cycle ball, also known as "radball" (from German), is a sport similar to football played on bicycles.
The sport was introduced in 1893 by a German-American, Nicholas Edward Kaufmann. Its first world championships were in 1929. Cycle ball is popular in Austria, Belgium, the Czech Republic, Denmark, France, Germany, Italy, Japan, Russia, Sweden, and Switzerland. The most successful players were the Pospíšil brothers of Czechoslovakia, world champions 20 times between 1965 and 1988.