One example is lifting the leg and keeping it high without any support. The principles of flexibility training are the same in all sports. Only the required level of a given kind of flexibility varies from sport to sport. Flexibility training is speed-specific because in the muscle there are two kinds of stretch receptors, one detecting the magnitude and speed of stretching, the other detecting magnitude only. Dynamic stretches improve dynamic flexibility and static stretches improve mostly static flexibility, which is why it does not make sense to use static stretches as a warm-up for dynamic action.
Flexibility training is also joint-specific.
One person may have great flexibility in some joints but not in others, some joints may have great range of motion in one plane of motion but not in all planes. Finally, flexibility training is position-specific. These contractions cause arterioles and capillaries in the working muscles to dilate in proportion to the force of contraction. Static stretches do not facilitate these neural pathways, do not prepare the nervous system and blood vessels in the muscles for the dynamic task. You even sweat differently when warming up with dynamic actions than when doing static stretches.