Towards the end of the Labdog level, the ATC guards will start closing the gates before you can get to them. Take out your particle weapon and hit the SlowMo just before you see the second gate. With a well-placed shot, you can take out both the guards before they are able to close the gate. Proceed past that area to the next room and use the laptop to avoid missing an important story plot. Return to the unclosed gate and carefully walk up to the black wall. You will be able to see down to the story below, and can step on the pipe to the left without losing health or dying. Doing this will prevent you from having to fight the three guards or deal with the proxy mines.
