This thread is super disgusting, you have been warned.
This morning I was in the supermarket, heading towards the potatoes. A man was standing by the potatoes facing me and the lettuces (oh yes this is relevant, I wish it wasn't but it is).
As I was approaching he did an odd snort/sneeze kind of thing and a big trail of snot shot out of his nose and hung over his mouth and chin. So far so disgusting, but I suppose this could have happened to anyone.
He then cleaned his nose using his hand, no hankie, and threw the snot on the floor and partly on the lettuces. Repeat three times. I kid you not and I am not exaggerating. It was one of the most disgusting things I have ever seen. I came close to shrieking, but managed to back off and run to the tills, looking behind me all the time to make sure he was not anywhere near me.