[That gets a soft laugh.]

It's only flammable when it's still a powder. Once it's mixed into bread dough, it's too wet to catch fire.

[Or something. That sounds legit enough, at least.]

Oh, right, the kitchen... Whatever happened in there was way too intense to be flour, I think. The stoves were gas, so my money's on some kind of gas explosion. I thought you meant other booby traps had been set.