I've seen just about everything lugged on a city bus, from musicians hoisting 6-foot-tall double basses to millennials with unassembled furniture. This was my first live Christmas tree though. The passenger swiped himself on and positioned his fragrant cargo in a seat in the back. I hoped the miniscule bus forest might inspire a round of holiday carols ("Deck the Halls" would have been nice), but the M5 bus is no La La Land. So I closed my eyes, breathed in deeply and imagined I could smell fir boughs all the way home.