Gestures can be taken as a Limitation on some martial arts powers to indicate that the character has to have his hands (and/or feet) free to perform the ability. For example, a Force Wall ability defined as the character blocking all incoming attacks might take this Limitation, since the character couldn't do any blocking if he is restrained or Entangled.
GMs should be wary of allowing characters to take this Limitation on attack powers, however, since some players may try to take it on any martial arts attack, on the grounds that they have to be able to use their hands to punch, strike or whatever. This leans towards abusiveness and rules-rape, and should generally not be allowed.
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