I had in mind it'd work something like this: You come into a room like that of the pre-v0.3 'room2', with glass panes and a large storage closet behind them. 096 would be sitting up against the opposite side of the glass, caked in blood from another passerby. Once you walk up to it, you'll hear the footsteps and the guard/npc will walk in, he'll look around, and see 096, whom will get up and freak out. He'll approach the npc (with his back still against the glass), and tear him to shreds, obscuring the glass with blood. This'll be a 1-time event, like the suicide guard, and I think it'd be a neat way to show off how 096 processes his targets.
I would find it more scarier if you were walking near 096 containment chamber and suddenly you start to hear the guard getting killed before entering the cell.
but that idea is amazing if it´s done with a nice and smooth animation.