 This is in contrast to freestyle BMX flips, in which a person revolves in the air about a bicycle.Acrobatic flips can be started from a stationary, standing position and they are also commonly executed immediately following another rotational move, such as a roundoff or handspring, so as to take advantage of the angular momentum developed in the preceding move.In general, the hands do not touch the floor during execution of a flip and performers typically strive to land on the feet in an upright position, but it is not required to be considered a flip.