So im doing this quest : speaking with silence and I've worked my way into the veil sanctum to the puzzle door: after coming back, and dismissing my follower and a few reloadings he opened the puzzle door, but after i enter ( with weapon drawn) Karliah shoots me with the poised arrow, i fall down and Mercer Frey comes in and just stands there doing nothing, the cut scene lasts forever and i cant get up! i tried waiting function but it doesn't work, i tried becoming a werewolf but right after i come in i get shot and it glitches anyways, by the way: i have Serana the vampire following me to take her home, but she cant get in with me inside the sanctum, im on XBOX 360 plz help and dont mind my English, it's my 3rd language guys.