"Right. I think this needs more unconventional methods. Rillian... step out of the room, please. You know, a craftsman and his secrets...?"
When Ogrin is alone in the room, he'll try the rock trick mentioned earlier. If that doesn't release the trap, he'll try opening the door. In either event, he tries to expect the unexpected.
He'll also leave his backpack and all worn equipment near the exit.