Wordplay/ What's fun about the HPs?

[Deb]

No: HPFGUIDX 152578

(snip)
> Can I say first that I'm never sure where a fellow group member is 
living 
> so I don't know whether English is their first language or not so 
I apologise 
> if I'm "teaching my grandmother to suck eggs".
 
Deb here:
 In addition to the wonderful wordplay examples already given there 
are such treasures as:

the St Mungo's patients
  the female victim apparently of a failed Polyjuice potion, who has 
the head of a dog - being "barking mad" 

  the patient in the waiting area who clanged - rang a bell

  the patient letting off a high-pitched whistle was "steamed"

The Floo Network -flew through the flue 

Dumbledore "drawing up a chair" at Harry's disciplinary hearing

Wouldn't a "leaky cauldron" also be a sieve? To "leak like a sieve" 
can mean to disclose secrets and a Pensieve "leaks" secret 
thoughts.  

Veritaserum has to age - like fine wine - "in vino veritas" - and 
Slughorn and Hagrid sure share some "truths" after getting drunk 
after Aragog's funeral. 

Deb (aka djklaugh) wondering if the first patient mentioned above 
was actually from China and escaped from St Mungo's then traveled to 
Hogwarts to meet the Whomping Willow would she be barking up the 
Wong Tree?