Freestyle

This dance form involves lot of physical movement, usually done to music, which
is not planned or choreographed ahead of its time. In its most extreme form it is
the very opposite of choreography, however it can be argued that such an extreme
level can never be reached, as we all to some degree plan our moves beforehand.
By definition, this kind of dance is never the same from performance to
performance,although it can be done formally and informally, sometimes using
some sparse choreography as a very loose outline for the improvisation.