The party moved on to explore the hallway. They hadn't gone far before they encountered a cave-in. Haskins moved forward with his torch to verify that the passage was blocked, as indeed it was.
"Hang on," said Joshua, alert again to the strong stench of reptiles. He dropped to one knee, his eyes following the trail of the large lizard. "Big guy was sniffing around here for something."
Joshua tumbled a few rocks out of his way, revealing a set of metal doors, jagged, broken, and mostly rusted through. He tugged at the doors, but they would not budge-- probably rusted into place, and most definitely blocked anyway either in front or behind by the collapse.
The upper portion of the doors were blocked by the cave-in, and it would take hours and lots of equipment to clear them, but by moving just another few rocks, Joshua had opened a hole big enough to crawl through.
"Hand me that torch," said Joshua, not realizing that Haskins had already dropped down beside him to help.
Joshua held the torch close to the crawlspace and peered into the room.
He sighed heavily.
"I don't suppose I need to tell you that the floor in there is...
moving..."