Metrognomes surprise me. I mean, you expect to see them standing in a garden. It's a little disconcerting to see them on the train.
I've always felt that there's something that's not right about them. They just seem "off." Early on, I'd say something about that but my drum teacher would just tell me to stop complaining and stay in tempo. I'd mutter something like, "If I played jazz, tempo would be irrelevant." He wasn't amused. I think he might have been part gnome.