Zul'Gurub & Undercity exploration

-this is my second movie-
I've just found two (maybe new) exploits, how you can get on two interesting places...
-In the first part of this movie you'll see, how can you get easily into Zul'Gurub (this part takes about 2/3 of whole movie).
-In the second part you'll see how can you get through walls of Undercity...it's pretty easy. The second part can be used to do big silent raid on Undercity :)

all was done on 2.1
I don't know if these two exploits are old or new, but for these, which doesn't know them, it'll be maybe useful (for fun of course)

Songlist:
300 Soundtrack - The Hot Gates
X-Ray Dog - Voices of Glory
X-Ray Dog - Black Fortis
Immediate Music - Liberation!
X-Ray Dog - Requiem for a Dream

--and of course, thanks for watching--.