Execute the following in the editor.

player allowDamage false; player setVelocity [0,0,100];

Player does not move.

Obviously this prevents the player from getting damaged via what I assume is some sort of simulation of g-effects, but it should by pass the damage handling, not the actual moving. This seems like the unintended consequences of this possible fix: http://feedback.arma3.com/view.php?id=13762