TIL that if you put your finger into a gun barrel and stop the bullet, the friction will melt your finger before it reaches the casing. Why?

It’s 6:15 PM, I’m sitting in my living room when I hear the sound. It’s like a small spring working its way through all the gears and machinery in my brain. Click. <br><br>A moment later, I get a notification on my phone. It looks like a text message, but the phone number is strange. <br><br>“Why does holding a saltshaker upside down, emptying it, slowly release salt over a short period of time?”<br><br>It’s the first time I’ve gotten this message. It took me about 6 months to figure it out. <br><br>Click. <br><br>It’s 7:10, and I’m reading a book on my computer when I get another one. <br><br>“Why do raindrops fall at the same speed, whether or not the rain is heavy?”<br><br>This one took almost a year. <br><br>Click. <br><br>It’s 12:13 AM, and I’m working on a math problem. I get another. <br><br>“Why do marbles have flat bottoms?”<br><br>I finally had a revelation about how these questions were connected. I started looking at them all together, and started reading the comments on the first one I got. It took me a few hours, but I finally solved them all. <br><br>By around 3:20 AM, I had. I got the following response before the messages stopped. <br><br>“That’s right. You may now take your finger out of the barrel, and live your life free from intricate mysteries and meaningless wonders. Good luck.”<br><br>I took my finger out of the barrel.