I was in Oxford city centre once, and suddenly got very bad stomach ache, I knew I had to find a toilet ASAP!
Eventually found a public one and ran in, there was only 1 cubical which was thankfully empty.
I dropped my trousers ready for relief and then lifted the lid, only to be greeted with what can only be decribed as a thick runny dark brown soup nearly level with the top of the bowl
I was that close to not being able to hold it back, I had to go for it anyway, so hovered above the bog and let rip a massive load of diahrea. At the same time I was praying there wasnt going to be enough to make it overflow over the edge of the bowl!
The smell was fucking unreal, with the mixture of what was already in there, it must of been blocked for ages
The relief afterwards was worth every second of sheer hell though!