Which "One liners" do you think most beg for an explanation ?

[saraquel_omphale]

No: HPFGUIDX 131110

Hi everyone, I've enjoyed the "which conversations do you most want to 
see" thread, thanks for the idea and everyone's input, which has had 
me LOL on more than one occasion.
  
Whilst reading the books, I've come across a few "one liners" which 
have always puzzled me - as in, "why put in that detail?"  Some of 
them may be real clues and others false trails, but I thought it might 
be interesting to collect together all the as yet unexplained oddities 
in one cauldron and cook up a potion. Or alternatively, dump all our 
thoughts into one Pensieve and see if a pattern emerges. The intention 
is not to wonder about non sequitors such as - how can Snape still be 
a spy after LV was present in Quirrel's turban in the Forest 
conversation in COS and he was named as one in court - but to collect 
together short lines of actual text. Then, we can also see what 
questions still remain after we've read HBP.

Here are some that have stuck in my head:

All quotes are from the British editions:

PS p45: (Hagrid about Harry's parents) "Suppose the myst'ry is why You-
Know-Who never tried to get 'em on his side before..." Why would LV 
particularly want them on his side and - before what?

GOF p500 (Harry's dream during divination) "He was riding on the back 
of an EAGLE owl.." (my capitals) - the Malfoy's owl is an eagle owl.

POA p315 (Sirius' letter to Harry) "I used your name but told them to 
take the gold from Gringotts vault number seven hundred and eleven." - 
why tell Harry the number of the vault.

OOTP p158 (Moody showing Harry the Order photograph) "Caradoc 
Dearborn, vanished 6 months after this, we never found his body ..." 
Confession of a hopeful obsession - is this the HBP - OK confession 
over, but mark my words, Caradoc will reappear...


So, tell me some really  interesting ones I've completely failed to 
notice!

Saraquel