When Célestine first came into our life, her windscreen wipers were both humourously vague and vaguely humourous.
When started they would wave like an unsophisticated two year old, wimbley wombley flapping rather than gliding, until they either clashed and locked together, or the right hand one wandered off the windscreen altogether and got caught on the windscreen surround. An added "bonus" of this behaviour was that the passenger only had a partially clear screen.
This had an added bonus of the wipers not clashing as soon as I started them - for some reason the driver's side wiper wouldn't start until after the passenger's, and they would just mash horribly.
This looked... well, weird.