It's hard to break a chain, its something that happens to younger folks, because you need to ride hard ( real hard ). I broke my first chain while mountain biking with a good friend 20 years ago. I have ridden many thousands of miles since, however I never broke another chain until last Thursday 4/20/17, see the below picture.

At first I did not know what happened, something was clearly wrong with the drivetrain, making the bike unridable. After a quick inspection the culprit would found....a link was broken. Me and my friend Sheldon started celebrating, it's not too often a 46 yr old man breaks a chain. Especially on a bike I've ridden for only 3-4 months.