I rode through a massive shit last month. It was in the middle of a pedestrian area and I'm 95% sure it came from a person based on the size of it. I've no mudguards on that bike, so I had to walk home or else I would have been sprayed up the back by human shit.
This morning I was shat upon by a pigeon riding down Brixton Hill.
(What the pigeon was doing riding down Brixton Hill is anyone's guess.)
But seriously, ew. Poo on my nice jeans.