Funniest thing you've ever done (mistake or not)

People always mislabel coding errors as stressful events, sometimes they can be hilarious, what's the most unhinged accident that's happened to you?

Personally I forgot to clear peer requests for valves to open during offline testing and when brought online all the bulk ingredient tank isolation valves opened, mixing different lots :)) Despite the mistake I couldn't stop laughing, probably because of the customers reaction. Lesson learned in the end.