Reminds me
For some reason this story reminds me of a particular lecture in a physics class I took in college. The topic of the day was thermal expansion, and so the professor had an cast iron ball and ring. He heated up the ring to show that it would expand and fit over the ball. Thing is, he got distracted and then the ring cooled onto the ball. Both of them are made of the same material, so heat and expand at the same rate, making him have a minor panic attack about having to tell the lab manager what he'd done.