I think the best heckle I had while riding my unicycle was from a policeman who shouted "Are your brakes working?"
(In the UK you are required by law to have working brakes on a bicycle. My unicycle had no brakes at all! Though slowing down was never a problem with the fixed wheel drive.)
> In the UK you are required by law to have working brakes on a bicycle.
But are you required to have them on a unicycle?
A fixed wheel counts as a brake, though I've only seen the law in relation to bicycles which require 2 working brakes not sure how this applied to unicycles.