Those guards can run fast for cripples.
BTW I found that tomb with the guy who has to locked in the cage and talks about how he's going to kill you as soon as he finds something. I waited around to see what happens because I read about it here... he eventually finds what he's looking for and then he fireballs the fuck out of you. I have like 90% fire resist and I still died in about three blasts.
I'm Level 48 now with maxed out heavy armor, block and one hander skill. 100 level block perk make people fly 50 feet into the air and lay on the ground like they just got run over by a semi.