The one where the party does not learn its lesson the first time it pulls a strange lever.
The party continued into the crystal caves and discovered a large room with a huge drider-like crystal statue in the middle in front of a giant double door. The party tried to side-step the area by sneaking up some stairs near the entrance, but things went wrong. A new party fighter was first, and he found a lever in a strange room with lots of machinery. He pulled the lever, but it was trapped, and the intrepid adventurer was fried into bacon by electrical discharge. (What was his name?).
Anyway, the party trundled through the room and the statue only emitted a minor dweomer. The statue held a large staff with a very large very valuable gem mounted on the end. It was determined that if the thief had let the switch down, a tsunami of magma would have come through the door. The door beyond let up into a tower-like structure. The entire tower was empty and devoid of water.
There were a few interesting areas: one had a large crystal dome in it. It could be perceived through the crystal that the cave was immersed in lava as it fell from the dome onto a great statue of a giant that the party refused to go investigate.
Yet another area had a large platform in the center of it. The party senselessly assumed the platform was an elevator, and the lever on the side of the platform activated it. Unfortunately the lever released a large stone stairway from the ceiling which swung down on to the platform, and smashed the huddled party. Clanger was reduced to negative hit points, but was healed immediately. Another room of interest was a large feast hall with two swords mounted on a fireplace with an imaginary fire burning within it. Roger snatched up the swords, and a lever was found in the fireplace which controlled the continual light spell in the room. Harlech grabbed a bag of tin cups and plates for good measure.
The session ended after the party climbed up through 6 empty tower floors which appeared to be barracks and arrived on a floor lined with bookshelves of what appeared to be spell books. A single skeleton creature sat behind a desk. He looked up at the party with two pinpoints of lights from black eye sockets and said, “Come in I have been waiting for you…”