Room: A Dead End
This room is within Mount Vesuvius.
A Dead End - - - (-------------------------------------------------) W <---(M)---> - - - - The rocks fill the tunnel forming a dead end. You give one rock a heave and decide it's not too smart risking injury lifting big rocks that could be support for others. You assume that because of the constant tremors of the volcano this part of the wall couldn't hold up and collapsed. The rocks shift their position slightly as a tremor moves beneath your feet.