One of the weirdest railways was the Daddy-long-legs that ran along Brighton seafront. A combination of tramcar and boat from the era when electricity was exciting and new. Sadly the line didn't last far into this* century, but there are still a few relics as the video shows.
If you fancy reading more about the line, I recommend picking up a copy of The Extraordinary Daddy-Long-Legs Railway of Brighton by Martin Easdown.
A terrific volume that is full of photos and postcards that I've never seen before. It tells the whole story from birth to death and I'd consider it an essential buy if you have an interest in the line.