to do the snake glitch:
get right next to a wall go into the prone position and get as close to the wasll as possiable then switch to your secondary pistol and well holding the joy stick in the diriction of the wall reload 15 time then stand up. to you it wont look any diffrent but to every one else you will be sliding like a snake. and do not jump after you have done this of you will not be glitching any more