A man I used to work with on the railway previously worked as a trolley bus conductor. He frequently recounted a tale of when his bus was awaiting departure from Piccadilly Gardens...
A lady asked him if his bus was going before the one in front of it. He stepped down off the bus and looked at the wires, then at the trolley poles on his bus and those on the bus in front, then shook his head and got back on the bus.