Saw two and had one happen to me this past week. The first was a guy getting getting sick in line to Haunted Mansion. He stuck his head completely in the trash can (nice not to see what was happening but it echoed big time and just the thought of my head in a can yuck!)
The second was a guy that may have over indulged on adult refreshments and couldn't function too well at the bus stop. He finally lost quite a bit of money on the ground in front of the bench, and weaved his way out of the area.
The third that happened to me was while sitting in Turtle Talk, which was a packed room, I thought the teen girl next to me was just crowded over right after the show started as I felt hot sweaty contact to my leg. I didn't move because everyone there is sweaty right now and being that close with so many people it happens. After a little bit I looked and she had taken her sneakers off and it was one of her feet that was on me. I didn't say anything because I didn't want to be rude, but I was a bit grossed out because her foot was soaking wet and hot and well, yuck.