The Thing – XBox

The Thing - Platform: XBox
      
Beat the second boss
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You can get the Medic to follow you in by pushing him up against 
the big door then telling him to follow you and then open the door.

You don't need the medic just get the grenade launcher from behind 
the wooden boxes by using a frag grenade and use the flame grenades 
you will get with the launcher to burn the boss up.