Ate dinner at Monument Inn. Thought we would ride the ferry to get home. As we neared the Lynchburg side, we saw some people swimming in the ferry landing. It turns out that someone drove through or over the arms and into the water. I heard they got out . We nosed against an out of service ferry for a while so ferry employees could check things out, as I believe that there are no employees around the landing at night. Several Sheriffs showed up and an ambulance. We were then let off on the monument side of the channel.