Some people have this annoying habit when their throats itch. They won't just go ahead and politely cough, or drink something. They'll sit there and make this sound that's between grunting and trying to hock up some mucous. It'll go on for about 2 minutes.

Also as I was standing in line at a store last week I saw this girl popping her boyfriend's back acne while waiting in line. WHAT!?!? I'd rather have to watch them make-out.