What about the Door(that wasn't at the end of the tunnel)?

[potioncat]

No: HPFGUIDX 99577

 snip
> Ginger replies: 
snip
 
> So I put this out for debunking and/or comment:
> Suppose that a barrier, either magical or physical, was in place 
to 
> prevent Remus from escaping.  Sirius could have sent Snape safely 
> down the tunnel, knowing that Snape would have been properly 
> terrified, but that no damage would have come to him.  He would 
have 
> figured (and correctly so) that DD would have told Snape to keep 
the 
> info to himself, so there would be no problems for Remus either.

Potioncat:
It's likely Severus would have dashed out of the tunnel 
yelling "werewolf!" but it's also likely Sirius wouldn't have 
thougth of that.  He could very easily have expected to scare 
Severus.  And once again did not think of Remus.

Ginger: 
snip
> 
> Who does that leave?  One who knows his way down there, and can 
make 
> himself safe as he was no longer human, but small enough not to be 
> seen.  Wormtail anyone?
>snip 
> Motive:  Unknown, but I am sure we can come up with one.  I'll try 
> this:  Perhaps he thought that if he got Snape and good, that he'd 
be 
> rid of all those who bothered him.  Snape would be dead or worse, 
> Sirius, James and possibly Remus would be expelled.  He would no 
> longer be a toady for the popular guys to belittle, nor would he 
have 
> that nasty Slyth on his case by association.

Potioncat:
The little rat that no one has missed in this story. He would most 
likely have expected to demonstrate his real skills out of the 
shadow of the others!

Ginger:
> But it didn't work.  James came out the hero and Sirius didn't get 
> into big trouble.  So he stewed about it, joined the DE's and the 
> rest is history.  
> 
> So, limited canon, some reasonable deduction (that there should 
have 
> been a barrier), and a lot of speculation.   Thoughts?
> 
> Ginger,  tired, achy, and going to bed

Potioncat:
That's very interesting!  All these years Severus has been mad at 
Sirius and it might be Peter who deserved his wrath!  Do we have a 
quote from Jo that more info is coming about the prank or is that 
just something everyone is hoping?
Potioncat