After the echoing has finally come to a stop, Finn pauses and listens to the other side. The only sound that hits him is the rush of cold air, though. While the crack is too small for anyone in their party (save maybe for the Moogles) to fit through, he puts a hand on one side and tries to give a hard push.

And with luck! The door gives slightly, so he braces himself, grabs with both hands, and puts his back into it. "See anything?" he grunts after the door has given a little more.