Snape's Psycology: WAS: More thoughts on the Elder Wand subplot - Owner?

[lizzyben04]

No: HPFGUIDX 187468

<snip>
> 
> Montavilla47:
> I think there's a much simpler explanation.  Snape could have taught 
> the spell to Lily, who was, he thought, his best friend.   When first
> used it, Harry and Ron thought it a fun and essentially harmless spell.
> It would be natural for Snape to want to share a fun joke with Lily.
> 
> If Snape then discovers James using it (in the SWM), he has even more
> reason to snap at Lily, because it would mean she had taught it to 
> James (or possibly, to one of her friends, who passed it along).


lizzyben:

That would also explain why Lily's expression "twitched" into a smile when James used the spell on Snape. Snape was hoisted on his own petard, in a way - actually literally hoisted into the air w/his own attack spell. Lily might think that was ironic &/or funny, which would only increase Snape's rage.