Mountain Biking - Panning!!!
In photography, panning refers to the rotation in a horizontal plane of a still or video camera. Panning a camera results in a motion similar to that of someone shaking their head "no" or of an aircraft performing a yaw rotation.
Film and professional video cameras pan by turning horizontally on a vertical axis, but the effect may be enhanced by adding other techniques, such as rails to move the whole camera platform. Slow panning is also combined with zooming in or out on a single subject, leaving the subject in the same portion of the frame, to emphasize or de-emphasize the subject respectively.