Sputnik Skull

The Sputnik Skull is a skull in Halo 2 that is the equivalent of the Cowbell Skull in Halo 3. It is the most essential skull for glitching. Most vacations or glitches require Sputnik. Along with being a glitcher's best friend, it is also the easiest skull to get.

Tutorial
To get the Sputnik Skull, first load up the level Quarantine Zone on Legendary. Once the mission starts, turn around and look for a little tunnel. Go through it and when you're on the other side, keep walking forward until you see a little ledge. Walk all the way on that and then once at the end of the ledge you'll see the skull.