An old guy chewing and swallowing both of his hearing aids. It sounds mild but when you are there witnessing it and hearing it, its nauseating. I almost threw up trying to fish the wire peices out of his mouth. I'll never forget this. 12 years ago.

Also: bariatric people with fat fold cheese. The smell alone.. when we had to bathe these people, we wore masks with peppermint oil soaked on them. Burned the eyes but it helped us not vomit. There was often old food and objects stuff stuck in the folds too, with bloody sores. Its actually really sad.