In a world where everyone motors their sailboat (even to downwind destinations), it's nice to see sails raised on the horizon. These weren't your regular "white triangle" off in the distance though.
These were tanbark sails! Boosts don't come with tanbark sails, so the owner had to make a deliberate choice to go with tanbark. These tend to be people who actually sail their boat!
When he got closer, we could see that he also has a cutter rig. As quickly as he appeared on the horizon, he left just as quietly since we were sailing on opposite courses.