Run (FORWARD and SIDE STEP at the same time) down the tunnel, then at the end of tunnel right be for the door shuts (JUMP. But that is not the end. You have to fight several more men. Another hint is Dont run all the way up to the guy in the elevator that sets off the blast. Go torward him side stepping untill he just starts talking then run!ALWAYS sidestep and go forward at same time.Jumping alot seems to help also. Good Luck!!