The safest and most consistent way of doing the Airlock 2 puzzle: As soon as you use the ordinary screwdriver on the panel, hold down left and stop as soon as the character does one full step left and run forward to the door. Do not quickturn and then run to the door, because it's too slow and you won't make it. Once at the door, open it and stand in the doorway (not necessary but safer than just standing infront of the door), quick turn and wait for the trimorph to pass and then run to the airlock. When exiting, stand on the left side of the door and face the wall (if you face the door you will be killed when the trimorph comes in). Once the trimorph passes turn and exit the airlock.