* Spoilers below of Dark Brotherhood questline *
In the Dark Brotherhood Sanctuary;
... after the quest to kill the emperor completes, you find Nazir and kill the guy fighting him - you then decide that you must both escape the sanctuary quickly as it's burning - during which time the Night Mother speaks to you and tells you to join her as it's your only chance of salvation.
When I do this, it starts a cut-scene and the screen goes dark. You then hear what appears to sound like the building collapsing - at this point my Console freezes and requires a hard power-off/power-on. I retried 2 further times and it appears to be persistent and permanent.
Other than dropping everything that I'm carrying and trying again, is there much I can do to fix it? I was kinda hoping for a New-Vegas style "put on a cowboy hat and enter the strip!" style solution! :)