I once had to wait a long time for my parents to pick me up from work and I sat on a bench outside our workplace to wait for them, which happened to be where an older man was sitting too and he went on and on about some aspects of his life, but mostly about the military and how it was the best decision he ever made in his life. I didn't do much talking since I was a nervous, shy guy at the time, but he talked my head off.