spontaneous acts of kindness

"Ma'am, your burger has been paid for. "  When I see articles on positive cultural observations in the newspaper, as opposed to reports on catastrophes, calamities or simply negative observations, I am hopeful that we may be on the right track.  The track to what you may be wondering? The negative stuff is so pervasive in our culture and the media.  We get this quick jolt of negative energy, similar to a sugar high, then it's over and in the long run that constant stream of negativity is draining.

So back to the positive stuff.  The NY Times had a wonderful article this week-end on the apparently increasing occurrence of spontaneous acts of generosity.  Totally gratuitous, these acts do not come from a calculated expectation of something in return, but rather a spontaneous opening of the heart to others. This is more where we're headed - eventually - if I interpret the signs correctly - more empathy, more kindness, more opening of our hearts to others.

Any idea for a spontaneous act of kindness?