Got Last Halo 3 Skull

Well, I got Halo 3 for Christmas a while back and while playing through the campaign for the first time, I was determined to get all of the skulls (with the help of GameInformer's Secret Access guide). I got all of them except the silver Cowbell Skull becuase I just couldn't get high enoguh on the grav lift. I tried all different ways; without the grav lift, gravlift plus plasma, etc. Yesterday my XBL was screwed up so I thought to myself, "I'll try for the skull again," (after giving up for a couple months). And you know what? I got it! I looked it up on Youtube and found a video that showed me how to place the grav lift on the ramp and do a "jump-and-grav-lift" move which got me high enough. I now have all the skulls! :D