You don't actually smell burnt toast when having a stroke.
Joked about it to my roommate who was in med school once that "I might be having a stroke, or someone burnt their toast again." To which he responded "WTH are you talking about?"
So I explained the meme and he debunked it for me right there haha
If you're talking about the Heritage Minutes ad about Dr. Penfield, she had epilepsy, it wasn't a stroke. Smelling burnt toast was a precursor to her seizures.