You clamber onto the soft boulder, half expecting to be engulfed by it at any moment.  Getting over it is difficult, as your limbs sink into its soft casing, but eventually you manage to struggle over it.  Relieved to be back on firm ground, you head east.<br/><br/>The tunnel makes a sudden turn to the left and heads north for as far as you can see.  The footprints you are following start to peter out as the tunnel gradually becomes drier.  Soon you are beyond the dripping roof and the pools on the floor.  You notice the air becoming hotter and you find yourself panting even though you are walking quite slowly.  In a small recess on the left-hand wall you see a section of bamboo standing on its end.  Lifting it down, you see it is filled with a clear liquid.  Your throat is painfully dry and you feel a little dizzy from the heat in the tunnel.<br/><br/><em>Your choices are to drink the liquid, or to continue north without drinking the liquid.</em>