Gears of war 3, spider bss

How do you kill the giant spider boss in GOW 3? Ive already blinded it and killed its offspring but now the spider is going crazy, running around the cavern. How do I kill it? Thanks guys
Answer #1
Have you ever heard of Google? Just type the first sentence that you typed in here verbatim and look what magically appears:
http://www.google.com/search?q=How+do+you+kill+the+giant+spider+boss+in+GOW+3
Answer #2
Google Gears of war 3 walktrough..Youtube is your friend..