Addendum RE: [HPFGU-Movie] Re: One Man's Review - possible, but hopefully, few Spoilers

[Valerie Flowe]

>  Add: Except we do "overhear" him call Snape Snivellus in the beginning
>  before Crookshanks eats the ear. This is not overly obvious though.

Ha! I missed that part. I wished that they had shown that conversation 
face to face instead of way in the background as we were all too busy 
watching Crookshanks eat the ear, to really pay attention to this 
important 'set up' dialogue.
Can someone remind me in which book we find out that Sirius almost got 
Snape killed by Lupin? Was it this one? GOF? POA? I know the movie 
didn't want to paint Sirius as anything other than the doting 
godfather, but certainly the viewing audience hearing this backstory 
would help them understand why Snape hates Sirius so much.
Valerie