I've had an experience that can probably top the most disgusting thing ever lol. Now, I'm actually very big on getting messy with very gross and smelly things so this wasn't really that bad for me since I'm always game for something fun. However, the nature of this one is pretty bad for most other people so I think it'd win out.
This actually happened 2 weeks ago. A local animal shelter was doing fundraising and awareness alongside an adoption weekend. A friend of mine works at the shelter and we ended up brainstorming ideas for the fundraiser and came up with this: fill a tub with dog poo and sell tickets and take donations to watch someone take a dip in it. Well, I ended up being the only one brave enough to take the plunge! Because all the dog poo was from the shelter, and because the dogs are healthy there was really no major health risk on my part, but I did get a course of antibiotics from my doctor just in case (I ended up going to him ahead of time to make sure everything was in order).
The shelter saved about two or three weeks worth of dog poop for the bath and kept adding fresh stuff right until the stunt began. They added water to each bucket daily to keep it fresh and moist. Once the adoption weekend arrived, they had a metal bin with more than enough room for me to fit into. Well, they made the announcement that the stunt was about to begin and there was a HUGE crowd that had paid to see me do this! Then they started pouring all the buckets into the bin and it damn near overflowed, and the smell was so strong a lot of people nearest to the stage had to back off.
I had on a bikini, my hair up in a ponytail, and had to wear small swimmer's goggles to keep the stuff from burning my eyes. Stepping into the poo bath felt a lot like really slimy mud and it really sucks you in. I had to fight to get my legs free enough so I could lie back in it, and as I'm sinking down it felt like it was pulling me under. The texture as a whole was thick, and I could feel older lumps of poo breaking up and turning to mush under my feet, legs, butt, back and everywhere I moved my arms once I stuck them under. It was also very warm since it was about 90 degrees (F) outside and they had used warm water to keep it moist and soft.
The smell was, well, what you'd expect lol. Very, very stinky (I don't think I can really stress that!), sort of like stepping into a cowshed or a stagnant swamp mixed with vinegar, rotten eggs and a hint of rotting food.
I sat in that tub for about 30 minutes up to my neck in dog poo as everyone watched, took pictures, posed nearby the bin while I stuck out a hand to give a thumbs up (but keeping their distance lol), etc. Donation cans were also passed around to the onlookers during the whole stunt. The big surprise came at the end. While I was sitting in the tub, my friend who helped organize the event came over to me with one of the buckets, filled it up from the tub and then pushed the whole thing over my head! It felt like moving in slow motion just from how thick it was, it came off a lot easier but my hair was sticking up all over the place and absolutely plastered in dog poo (it felt like someone had stuck glue to my head then spiked my hair).
I was completely covered head to toe, and had poop stuck under my toenails, fingernails, and a huge pile decorating my head.
The crowd was roaring with laughter and gags all at once, but on the plus side, the shelter raised several thousand dollars in the event (about twice as much than last year), and 26 dogs and puppies were adopted that day.
I never got sick from the stunt, but it took about 2 hours or so to start feeling clean again, and I smelled really bad for about a week after it. I still catch of a whiff of it from time to time now.
From 1 to 10 on a level of nastiness, I'd give it a 50+. But I'd totally do it again, and with the funds raised by the shelter, there's a really good chance that it'll happen! I'm probably the only girl that was brave enough to try it out, and be willing to dive in a second time lol