need help with halo 3 grunt birthday party skull!?

[Robert Lopez]

i need help finding it and what's with the effect and how do you use it!

 

[ruleof_rose]

its on the crows nest by the part where all the drones are in the tunnels and you drop down the shaft. Just crouch off the ledge and you should be below the cage. Just grab it. When you kill a grunt with a headshot, confetti pops out and children say yay!

 

[Mafatu K]

http://answers.yahoo.com/question/index;_ylt=AkKkt_44UynF9t_W3MXjzfPsy6IX;_ylv=3?qid=20090304092720AAjO7Ik