There is nothing like wedging yourself up the face of a cliff, while your feet are squeezed into a pair of shoes two sizes too small, which help you stand on features no thicker than the width of a coin while you shove your hand into a narrow, sharp crack.

Except for perhaps the feeling of flying you get when tumbling down a gymnastics floor or locking yourself into a strength hold on the rings.

Either way, as long as I am active.