The technique is often used to follow a subject that would otherwise leave the frame (ergo, it is often called a following shot), such as an actor or vehicle in motion. In this spirit, any conveyance, such as a motorized vehicle like a car, may also be used to create a tracking shot. A handheld or Steadicam mounted camera following a similar trajectory is called a tracking shot as well. While the core idea is that the camera moves parallel to its subject, a tracking shot may move in a semi-circular fashion, rotating around its subject while remaining equidistant.