Trolley freight
I was standing on the bus as it came across the Ross Island Bridge, and I saw a headlight down on the Portland Traction embankment. I grabbed out my camera and took a few quick pictures of this Portland Traction train pulled by EPT #100 before the bus crossed 99E. I was playing with manual focus, so all of the pictures ended up blurry, but this is the least blurry one.
(As a general rule, I prefer manual focus because autofocus tends to get hung up on the wrong thing. In practice, my vision is bad enough so that manually focusing ends up with everyone else getting the same sort of view of the world that I have.)