Let's start with hub-deep cow shit...because where else would we start...
"For me the worst was having to ride through hub-deep (no exaggeration!) cow shit on an MTB ride in Derbyshire many years ago. It was a route I had used several times, and the bridlepath goes through a farm yard between some cow sheds. It was often muddy or slippery with cow shit, but this time I reckon the farmer must've recently scraped/hosed all of the cow shit out of the sheds and deposited it in the yard. It was horrendous!" Dicklexic recalled.
Kapelmuur said: "I rode over a snake in France, it didn't make much of a mess and it may have already been dead. I didn't hang around to check. I guess this story doesn't have legs."
andystow was awarded the most middle class comment of the day award by another reader: "I didn't ride through it, but on a multi-day gravel bikepacking trip I had a little unplanned dismount/lie down. When I got up, completely unhurt, I felt a cold wet mess on my back. The avocado in my back jersey pocket had become instant guacamole. Luckily I had a spare jersey to change into."
Drinfinity commented: "Frogspawn. Riding through a particularly deep water filled rut on a North Yorkshire moor. My partner was having a miserable ride till then (not a fan of deep ruts), but she was much more entertained after I did the international interpretive dance for 'my boot is full of frogspawn'"
Bawheid has all the gory details..."A weasel. Extruded through the front brake, put me on the floor. Washed off blood and bits of skin ( both) and flesh and entrails (his) in a public bog full of very wary tourists. Joy." Chrisonatrike stole the show with the "pop went the weasel" comment...10/10.
JustTryingToGet said: "Worst thing I've cycled through... the River Thames. Pure stupidity on my part, I'd come down to the meadow and it had flooded, by which point I couldn't be arsed to go back up the road. I thought I'd just take it slow as I knew where the path was. Three quarters of the way through and I thought, 'blimey, those benches look far away'... I reckon I was centimetres from the riverbank. I'll not pull a dickhead move like that again."
Add Chorley and Harringey to the list too... thanks to whoever suggested those on Twitter...
Well, that's an image to take you through to teatime...