(TF2: RvB) Cloack and Dagger it.
From Create Your Own Story
You realize you have the goddamn Cloak and Dagger. You sit by the corridor, not moving a muscle. After what seems to be an hour, you hear footsteps above. When you look up the opening in the ceiling, a Soldier is pulling out his Rocket Launcher. You have to think quickly if your going to save Heavy and Medic.