Capture Real Life Candid Moments for Our Photo Challenge

The best candid photography captures people living through an event, often without their knowledge of there being a photographer present. One of the beauties of this technique is being able to catch someone "in the act." It adds life to their portraits. The results can tell marvelous visual stories about their lives.

For this week's Mashable Photo Challenge, show us your best candid shots. In order to capture the perfect moment, you'll want to develop the ability to observe. Remember this man, who happened upon a wedding proposal and photographed the beautiful moment?