This was a problem for me also. Actually all you have to do is to keep making the run and you gradually learn it.
It happens so fast that a walkthrough is ineffectual.
There are two good places to save on the way and as you find each your run becomes shorter; but the moment you load the save you gotta run because time is important.
When in the end you run into the kitchen jump over the long kitchen cabinet, turn right (you dont have to shoot any cans as someone posted) and through a door on the left and voila! you are out of the fire, kill the waiting baddie and then pause to congratulate yourself.
