Ron's experience in MoM

[Missy]

No: HPFGUIDX 81549

<snip>
>  "According to Madame Pomfrey,
> thoughts could leave deeper scarring than almost anything else, 
> though since she had started applying copious amounts of Dr. 
Ubbly's 
> Oblivious Unction, there seemed to be some improvement." (US 
> hardcover p.847)
> 

OK- I have a different take on this.  I'm pretty certain that Ron was 
hit by some sort of charm in the planet room.  This lead him to be 
confused, giggly, whatever you want to call it when Harry met them 
outside the room.  

Then, Ron in his giggly state sees the brain, comes up with the ever 
classic, "Accio Brain!" (which the mental picture still makes me 
giggle).  The brain had those tentacles that wrap themselves into 
Ron, and if I recall correctly, Ron then seems to be in pain.  I just 
thought those tentacles were physical manifestations of thoughts.  
And when they dug into Ron, they left scarring.