I used to know how... but I'm rusty, and I don't have a photoshop (or similar program) to make graphics anymore.
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I like the idea of Cleddau seeing the burned bodies that are aligned with holes in the walls, putting two and two together and realizing it's a trap... then motioning to wait, checks the hall and makes it to the door, there realizing he or someone could stand there safely while someone activated the door switch releasing the flames... maybe he says something to the affect that these type of traps have shutoff on other side before opening the door... then when it's open pulls the chain to shut off the flames.
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regarding low crawling, in crouch mode, you can sneak down the right side without getting burned.
OH! and if no one objects, after Cleddau checks this first door, I'd like to post a nice little (read that as detailed long) post to describe the next area
Although I may need to make a few tweaks depending on how the rest post... I just walked through a short bit and wrote up the post
Yeah... I'm nuts