There weren’t any explosions on the ocean floor, so maybe the man who brought us Avatar and The Terminator just got bored. Although the director James Cameron called his record-breaking solo dive to the bottom of the Mariana Trench a “heckuva ride,” it didn’t sound that spectacular. “It was bleak. It looked like the moon. I didn’t see a fish,” he said. He also had to surface three hours earlier than planned Monday because hydraulic fluid began leaking. “Next dive. Gotta leave something for the next one,” he said.