Stopped traffic. A couple of decades ago, the only road from Silicon Valley to Skyline in the hills was blocked by construction equipment repairing a washout. My wife got out and walked up the line to see what was going on. She started talking to a man standing there. Turns out he was a freelance developer and my wife said, "My son knows how to program.", which lead to his firs job as a programmer in high school. In this case a connection made in stopped traffic.