I can't get past the guy your suppose to take down or what ever in the training, i've spent two weeks trying to get past him. I'm quiet i barely even walk sometimes, i even crouched and walked slowly, nothing he stills knocks me down. What do i do? The guide says stealth mode but there its no stleath button and what i've been doing isn't working. I walk up slowly and i crouch i wait for that little bar to be green but still. Anyone please help me. Appriciate anything you can do.