Definition of 'sad'

Imagine..... a quiet road.... a pedestrian crossing.....both sides lined with parents with pushchairs or holding the hands of eager toddlers.... everyone is waiting for the green man to appear...... he doesn't...... time passes...... toddlers become restless....... nobody moves - no parent wants to be the first to imply that it's okay to cross when the red man is still lit up..... the road is clear but still no parent wants to be the first to yield and traumatise a horde of kids instilled with a Pavlovian sense of safety.... the road still clear.... no one yet moves.... did anyone actually press the button? Apparently not.