You are very right about not being a boring neighbor. Trust me though, that's absolutely nothing compared to the things that have happened on the residential premise when I was too lazy to take one of my chemical propulsion projects out to the official test site. I created one particular chemical compound which was unofficially dubbed "184" for the decibel level it achieved upon detonation of only three grams. It was of course too unstable for any prospective client to use, so I couldn't sell my research to anyone. Although, I take two 1-gram "delivery systems" with me when I go camping in the wilderness. I guarantee they will repel any attacking beast.
I imagine if you continue the flame-throwing for an extended time, such as 20-30 minutes, you should end up with a superheated oven depending on the size and mass of your oven. I don't think you'll have a problem with an oven experiencing thermal shock. You might get micro-fractures over time, but you should be able to prevent that by using very quick bursts initially, and progressively making the bursts longer. When I perform this in my bathroom, you can definitely hear surfaces warping and joints shifting in the form of crackling noises.
EDIT: By the way, it is very comfortable afterwards.