I Broke Mr. Thompson's Ruler

So last week in math class, I was really bored and needed some serious attention diversion. I saw Mr. Thompson’s ruler on his desk, he uses it to tap the board whenever he wants silence. So, I picked up the ruler and bent it super far but pretended like nothing happened. Now every time he taps for quiet, it bends more and makes this weird noise. He hasn’t figured out what's wrong yet. It was just so funny seeing his confused face each time. My classmates thought it was hilarious too. I would totally do it again if we get new rulers.