You work with John Kramer, not as an apprentice, but more as a friend. He told you he was going to be out of town for a while and needed you to come by the workshop and fill in for him while he was gone. Making sure everything was going correctly. Which annoyed Mark; he didn't need a babysitter.

Mark walked back into the room of the coffin trap, where Agent Strahm had just been crushed to death. He leads you into the room as both of you are met by Strahm's crushed, mangled body, as it drops to the floor with his intestines halfway out of his body. Mark looks completely unfazed as he stares at the body with a cold, stone glare.