Escort Sig in Under port

when you get through the door get out of the titans suit and go around the corner.there
you will find sig shooting metal heads. do a jump roll and you will start talking to sig.
then when you get to the boxes don't use the gun bit punch,punch the box on the right and
that will lock into place and then punch the box on the left and that will lock into
place. but first you need to punch the box to the left e.t.c.