SO I've played through the regular adventure, and I was playing through the master quest. I'm in dogono's cavern, in the room above the bombed staircase that has 3 dogono's. As the last one dies, I begin to climb the ladder in the middle of the room. Then the cutscene showing a big treasure chest appears. Then control shifts back to me. The 3DS is completely unresponsive sans the HOME button. Background music playback is still working though. Left at a frozen (not blank) screen. if tldr: Don't climb a ladder when a cutscene is supposed to happen. Wanted to tell the internet.