This aint my video but
this pretty much sums it on what happened for me!
http://www.youtube.com/watch?v=CZ6jNnhlTck



Master Difficulty gets challenging, but I find that it's simply a potion chugging contest. 



Because you might end up saving too late, so that the instant-kill hit comes a millisecond later and you can't get out of the way anymore. Load -> instant death again. Whoops.