I accidentally called 911 in class a few months ago. It was just a normal class, until I heard weird muffled sounds coming from my pocket. I checked, and lo and behold, it seems that I've triggered some emergency SOS system. In my panic, I hung up, and immediately realized that that was the worst thing I could have done at that moment. Luckily, the operator called back a few seconds later, and I explained that it was an accident and they said it was all good. That memory still haunts me to this day, and I wonder what terrifying thoughts the operator must have had when I ended that call abruptly.