Grimrock

I am where this guy was after that small room with the moving teleports, I moved a switch again and now facing a red door on the left and bars on the right its really bugging me what to do here any help? Just turn around and keep exploring, you'll find the switch to open that Iron Door nearing the ...

Anybody can tell what to do there ? It´s a secret on lvl3 right after the teleporter puzzle Put something on the trapdoor through the grate and press the button next to it. Edit: Or one could look a little further down the list of topics and find this thread... http://www.grimrock.net/forum/viewtop...