Is it possible that someone has started to smoke 💨 and it is just trying to keep it a secret? One thing that happened to me when I was a child when I had a seizure an unusual taste came to my mouth. That taste ended when the seizure was beginning to end.

That smell can warn of an event, power surge, phantosmia, brain tumor, faulty wires, overheated appliance, mold, chronic sinus infection, allergy, very bad cold, antidiabetic or antihyperlipidemic agents. Among people taking proton pump inhibitors, phantom odors may also be a consequence of gastric gas reflux.

Also, the heating element can be bad and needs to be replaced if the new oven is burned off from the material. Even after cleaning with chemicals, residue can still smoke. Some cleaning methods include white vinegar and baking soda to vinegar with dawn and rinse. If there could be a surge and fry, the electrical outlet needs to be replaced with electricity turned off. Recommend an electrician so they can also check other outlets if there is no GFI for the electrical panel and have the oven inspected for the heater element going bad. It could also be the furnace's carbon monoxide. Ensure you have a carbon monoxide detector since there is usually no odor, and some people have died from that. Also, check if Radon gas is on site; it is also a silent killer like carbon monoxide.

Sounds like you’re experiencing some form of a AURA ( form of a seizure ) . A lot of people will sometimes go into a bigger seizure after the aura.

Interesting, when I have an aura the same thing always goes through my mind. Guess it can be different for some, and the same feeling for some too.