Argus wants a fight.
He just keeps smacking you. Open the hatch with the pedal.
You have to be quick. While he is holding it, pull the lever to go down.
Oh yeah. Open the hatch again with the pedal and remove the throttle valve. The elevator will now have more speed. Pull the lever, again.
Now, you have to open the hatch, and while Argus holds it open, pull the lever to go down. Then stop it.