The circumstances are a bit vague, or I'm leaving them vague as an excercise to the user, but our new(ish) friend Brian was eating at our house Saturday night. I'd made lasagna. At some point, owing to circumstances left to the audience, but involving my lasagna, his heart, literally, stopped beating for some tiny amount of time. Enough for a little scare, but he decided not to call the ambulance.
The compliment--"Jacob, the lasagna was so good, I wanted to go back for a third helping, even though it gave me heart palpitations."
[warm, fuzzy glow] Jokes aside, this is the closest my cooking has come to killing someone :)