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.
Passing under the bridge at Loughborough Junction a few years ago, one managed to shit in my mouth. Well, it hit my eyebrow, nose, mouth and legs.
Thankfully I was about 100 yrds from home so spat a lot and stuck my face under the shower as quickly as I could. Still not ded