a
You mean like Jim Davis and Peter Storrmare?....;-D...
ha, ha! :D
I had cause once to research rapping and the style of dance that goes with it.
A main "rule" is that no one can use the same gestures or sequence of gestures,
or, more realistically, they compete with each other for originality within the style.
That leads to contortions becoming part of the repertoire for anyone capable.