Ok this is a really useful glitch for sniping in castle. It's a bit hard to describe. Ok, in castle, go all the way to the japanese part where theres some stairs that lead up next to some stairs next to a big building where there is a small roomby itself on the top of the building. If you get the right stairs, you'll come to two barrels on your left and three with some sacks further away on your right. Now, get on the three barrels with some sacks and make a big jump to the two barrels. The two barrels you need to land on are right next to a wall, jump on the red top of the wall and follow your way across it to a building a few metres away. Now face the building and keep crouched, then move to your right while crouching until you drop down a tiny bit, where your just on the right of the red bit of the wall. Still crouching, move to the building in front of you until your touching it. Then stand up and you should quickly float up. Once you've stopped, whip out your sniping rifle and start shooting. HINT: When floating, don't move to your left or forward because you'll fall and easily die.