gas explosion

What everything that happens in a hidden magical society on earth was blamed on.

Person:"Hey, did you hear about the museum exploding?"
Other Person:"Yeah, heard it was caused by a Gas Explosion"
Person;"Funny thing, there wasn't a single gas source large to enough to cause an explosion of the magnitude"
Other Person:" Yeah, funny...."
*It was at this point that Other Person, knew he had to wipe Person's mind of this revelation, or his entire society would be found. And they can't have that, now can they?*