You would expect a captcha that shows you two yellow lines, and asks you on which side of the yellow lines a car should be driving. Wether there are unicycles present is totally irrelevant.
For real. Not /s.
Not in downtown Melbourne, but a definite possibility in suburban streets.
https://www.bbc.com/news/uk-england-london-68887800
They smashed up a bus and a regular taxi en route to Freedom!