How do I get past the collapsing floor, thieves guild level 2. Maybe strip down butt necked, Lol?

my sister and I were wondering the same thing... came up with the same conclusion... try jumping at an angle to reach the next nearest rock... we have yet to accomplish this but its worth a try!

Finally: you have to do a combination of run, jump(triangle), run, jump and then it works. run to the edge of the first stone, jump over to the third stone, etc