Ah yes...a familiar scene on the river. These tugs are pushing the giant ship to the dock to be unloaded. It is still amazing to me, after all these years, that these tiny tugs and push those giant ships into place with seemingly little effort. Butch says it's all about the twin screw blah blah prop blah blah blah propulsion blah blah things. I just nod and smile like I understand, and he seems satisfied that he has properly educated me :)