I've been getting into parkour and running, its really fun and you progress very fast. Climbing stuff, hoping over things, dropping and rolling out, its soo incredibly fun, but when you start doing more extreme stuff its dangerious as shit. Miss a ledge and you fall down and break your arm. Roll out of a drop wrong and you sprain your back. Serious shit, but very fun. Because I've been trying I appreciate freerunners and tracers so much more for the shit they do, its fuckin exteme.