20 People who did something “in case” and ended up preventing a tragedy

There's a little voice inside your head giving you a nudge, maybe to check if you've closed the gas or to get a jacket just in case. The biggest of the times is nothing. But from time to time, that cautious little voice ends up saving you from something disastrous. Today we tracked the Internet in search of stories of people who acted following their instincts or who made thoughtful, careful or even random decisions that ended up changing their …