Teen mashed gum in my hair
I was sleeping on the bus and felt something on the back of my head, turned around and a group of degenerate teenagers started laughing... I felt the back of my hair and there was a big wad of gum mashed in my hair.
I yelled at them "wtf are you doing!!?" They mocked me and kept laughing. It was my stop so I had to get off, but as I did so, one of them threw another piece of gum at me, followed by more laughter.
I think I have some kind of PTSD from this experience because I've had nightmares and moments of rage since then.