Hmm, Well, it's obviously Scar's dream because that's the only character you tag'd .lol Maybe it's a nightmare where his "demons" come back to haunt him for the evil he's done?.
But the dream seems to be about him as a cub. Maybe he's remembering how he felt when he did something horrible for the first time. A feeling that seemed to dissipate as he grew older. Just a thought >.<
)