It's much much worse than some poor cute kid 
screaming his cute little lungs out while trapped 
inside some strange tree.

It's poor Koganei inside... *shudder* *convulse* 
*twitch*... that icky disgusting Mokuren. The icky 
disgusting Mokuren who is not only a typically 
hideous bad guy, but very rarely makes exceptions 
to his rule of only loving the screams of women as 
he penetrates their flesh and gets off on their 
deaths...

Ok, enough tentacle sex. ;)

Worse yet, poor Koganei is actually inside Recca's 
vacuum of a mind (not a great place to be either, 
voids are dangerous), getting burnt to death, AND 
inside icky disgusting Mokuren all at once.

So, all in all, I would label that a not entirely 
happy moment.