Snape saved Harry on the "Lightning-struck tower"

[juleyjubes]

No: HPFGUIDX 165926

After recetly re-reading the end of HBP I have been thinking about
the end of the Lightning-Struck Tower chapter (UK hardback edition
page 556) where Snape "gazed for a moment at Dumbledore, and there
was revulsion and hatred etched in the harsh lines of his face".
Dumbledore said, "Severus...please".  After which, Snape raised his
wand and pointed it directly at DD and said "Avada Kedavra".

Now making some assumptions here.....

- Snape knew where DD and Harry had gone that evening and what they
were doing.
- Snape knew what was in the basin (he had helped LV make it).
- Harry feeding it to DD meant he was effectively killing him.
- It really was an Avada Kedavra curse from Snape to DD.

Maybe Snape and DD had a prior agreement that when they got back he
would have to finish DD off to avoid Harry becoming a killer.

Maybe that is why he had the look of revulsion and hatred, being
forced to help a student he so obviously disliked.  However, knowing
the prophecy (did he or didn't he know the full prophecy - I think
maybe he did) he knew Harry had to stay alive and fully intact to be
able to achieve his destiny of defeating LV.

Juley
(Who is seriously creeped out after having re-read this chapter
and realising how scary Greyback is).