The first thing Rino noticed about the switch he found was how it automatically led to nothing happening. Was this a dud? He did not remember dwarves being this crafty in his previous world, but maybe craftiness was required to survive in a world as harsh as this.
Rino went around trying to look for a second switch or level but found none. Surely, that wasn't the only switch in the area if the first was a dud, right?
While looking for the second switch, Rino thought he sensed something strange about the cave's layout. The tunnel might be mined by dwarves. However, the switch he found was placed in such an odd position that made Rino wonder if it truly was placed by the dwarves. He didn't know that their short and stock arms could reach so far into the thin crevice of these rock cracks closer to the ground and upwards. If Rino wasn't all bones already, he would never find that switch.