Question about Cat, Rat, Dog

[christi0469]

No: HPFGUIDX 32777

  Please excuse my ignorance if this has already been discussed, but 
how exactly does Harry plan to kill Sirius? He doesn't know about 
Avada Kedavra yet, and would most likely not be able to cast it if 
he did. Does he plan to stab Sirius with his wand? I admit I'm not 
an expert on stabbing (a fact for which I am quite grateful) but it 
seems unlikely that a 14 year old boy would be able to stab a man 
through the ribcage with what Harry describes later as a thin strip 
of wood. Even if Harry has enough strength from an adrenaline rush, 
it would still seem that the wand would break before it could 
penetrate the rib cage, especially if he has to kill Crookshanks 
first. Perhaps the high emotions of the situation keep Harry from 
thinking things through, but he has always managed to keep his head 
in life-threatening situations before. When I read this scene it 
always just strikes me as odd. Please let me know if there is 
something I missed.

As to the Lupin debate, I think the main reason Lupin changes when 
he does is because that is the point that JKR needs him to change. 
She may not have developed a comprehensive theory of werewolf 
transformation to write the book. Having said that, I suppose she 
could manipulate the timing of the scene to account for a werewolf 
theory, and the debate is fun regardless.

Christi