What demolished the Potter's house at GH?

[Jim Ferer]

No: HPFGUIDX 145716

Kchuplis:" But we saw a lot of other spells that bounced all over the
ministry and Hogwarts that DID cause a lot of destruction. Missed AK
spells seem to blow things up. I think there was just one helluva
fight at the Potters with James and LV doing a ton of damage."

We've seen lots of spells have a physical effect. We've seen Stunners
chip stone off gravestones, we've seen people knocked around.  There
seems to be two factors in whether this happens or not:

•	If a spell goes wrong or misses, it's likely to break something.
Think of the stunners that missed Harry in the graveyard or Godric's
Hollow.
•	The vehemence or power of the caster. Think of Snape blasting
Lockhart or Harry and Ron blasting Lockhart. (or of Snape's AK on
Dumbledore) If you're being intense (or po'd) when you cast a spell,
something's gonna happen.

Your examples from the MoM battle are perfect examples. Spells have
physical force, especially if they miss (think of an exploding power
line.)

Jim Ferer