By the time he reached it, Sam had forgotten why he was headed that way. The crumbly talus made him stumble painfully but he pressed on, driven by the need to go forward. He reached the rock face. It rose tall and forbidding above him, no longer appearing an easy climb. As he tilted his head back to stare at its height, dizziness sent colors swirling across his vision. He grabbed the rock and hugged himself to it to keep from falling.