Pstandard Psychic Pstance: The psychokinetic kind exists, as does the one-handed gesture version when using techlepathy.  In neither case does it have any actual power-related function whatsoever, and you can use either without doing the gesturing.  The former (see: Magical Gesture), is done purely for the sake of flamboyance, or possibly because if you’re – for example – summoning your drink from the other side of the room, you need to hold out your hand to summon it to.  The latter is slightly more practical – people do it as a way of indicating the techlepathic equivalent of “hang on a minute, I’m on the ‘phone”.

(So, as we said before – use all the rope and wrestling grips and paralytic drugs you like, your trachea is still gonna be crushed.)