Well as long as the thread's already been bumped, I'll say that the 3 open windows on that building parallel to the bridge just before the last point (phew) are kinda odd. One can crouch-jump up and run along the windowframe but not through the window, but every once in a while if you line it up just right you actually make it through the window (and fall to your doom). I don't know if that's an artifact of back when they changed how midair crouches worked, but it seems kinda wierd/easy to fix.
(sorry for not having a screenshot, I would have to restart to get into TF2 to take one)
(sorry for not having a screenshot, I would have to restart to get into TF2 to take one)