You can do a Ninja Blade glitch on the Xbox 360. So to do that, first thing you need to do is to go on the level 7. Then you need to go to that part of the level where video is showing and get up there. Now you have to land there with the help of twin falcon knifes sprint by jumping and rapidly pressing the y and x buttons. Now you can see a hole in the middle and you need to jump over there. After that, get over there where video is showing and that's it. You will see the deleted objects in the hole.