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If you slide a rail on the nose/tail piece of your binding, you are not pressing.
Rocking back and forth on the rail because you got on it from the side or for whatever reason is not pressing.
Crouching down low doesn't mean you are pressing.
Sorry to burst your bubbles Mcveigh fan boys but despite his ability to do insane presses and ride with butter style, more often than not, he's just sliding a rail.