Motorcycle trials, also termed observed- or footup- trials, is a non-speed event on specialized motorcycles. The sport is most popular in the United Kingdom and Spain, though there are participants around the globe.
Trial motorcycles are distinct in that they are lightweight, lack seating (designed to be ridden standing up) and have short suspension travel relative to a motocross or enduro motorcycle. Trials teaches great throttle, balance, and machine control. (more on wikipedia)