"Yeah." He at least has the grace to look slightly embarrassed. "I don't know. I've never managed to open one myself... I don't really know what to do. I've only climbed out, not back in."

And really, he's not sure he wants to go there, but he's got to get home. There's not an option. "But... um. It's... I've got to get back there. I need to help fight the titans..."