An aerial twist is an acrobatic flip[1] that incorporates a 180° rotation during the peak of the flip's height.
Gymnasts normally perform the twisting with the legs together to obtain a faster spin and more aesthetically pleasing execution.
Tricksters normally perform the twisting with the legs apart; mainly for style.
Many martial arts tricksters first learning this move have a tendency to begin more like a butterfly twist than an aerial.
In the tricking community, this move can be done from either a running start, a small hop skip, standing, or from another trick in a combo.