Praka will ask that one large pit trap can be made between this room and the rest of the cave. (with big, I mean 10 feet wide, 10 feet deep and stretching wall to wall) He will use his hands to help, or makes pointy sticks if it goes fast enough (How fast does it go) he will use his ladders (which he dropped in a cornor if working or fighting) to cross that pit after it is done.
Should we roll for trapmaking or so, or other crat checks?