wth no.. okay theawesomest srry 4 being mean but...
1st. u get ur knife
2nd. go to the places u see in videos (rattlesnake one is easiest)
3rd. walk so u hit the wall then slash like a few times
4th. u can use lagg with print screen or just run (or both)
5th. keep trying chances are u won't do it the first try.
tip kinda make sure your running at the very edge of wall for corner not 2 much to the right kinda so ur crosshair alittle bit to the right