While the digital voice assistant Siri is usually considered a pretty friendly sort, it appears there are times when she can be downright surly. Time reports that Breaking Bad star Aaron Paul might have found the one question that will have Siri going all Walter White on her users. Turns out that the computer program is not a fan of being asked to divide zero by zero. While most questions posed to Siri are answered with short calculations or even “I don’t know that.” The answer to that particular question comes off as quite prickly.

Imagine that you have zero cookies, and you split them evenly among zero friends. How many cookies does each person get? See? It doesn’t make sense,” Siri responds. She’s not done though. It appears the question really ticks her off because she lands a few body blows before finishing, saying “And Cookie Monster is sad that there are no cookies,” she continues. “And you are sad that you have no friends.

Now that you know that, give it a try, then ask her to divide anything else by zero. She’s not a fan.