The pirouette effect:

The word "pirouette" is derived from the French and means "to move in a circle".

In that case the sportsperson rotates around her or his own axis of the body. You may have already seen this while watching high diving, gymnastics, roller-skating, figure skating or ballet.

Here you can look at two pictures of a pirouette of a figure skater.

In which picture is he able to rotate faster? Click on the picture.