In 1995 a group of NASA scientists studied the effects of various legal & illegal drugs on house spiders, specifically on the way they weave their webs. The spider high on marijuana did an ok job weaving, but then got bored/distracted & didn’t finish.
You can learn a lot about a person when you stop "ringing the bell" or rewarding them through expectation of a conditioned response. How did they respond? Was it a mean, defensive response or a curious but loving response?