Yeah Bill, Hop. I think that that particular plug had just enough bouyancy stand at about 45 degrees on the bottom. Wave and current action caused it to "hop" along and wear the paint and a little pine off the bottom.
Woulda said "bob" but I thought that that would imply that it broke the surface. Slip, I lost one just like that to a seal and a MAC SS Special. I bet all the plugs lost there last season would stock a good sized tackle shop.